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Collection.isEmpty() should be used to test for emptiness (#1315)

This commit is contained in:
Igor Suhorukov 2018-02-08 11:20:00 +03:00 committed by Ian Luo
parent d388735548
commit d129f10229
42 changed files with 116 additions and 116 deletions
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2
dubbo-cluster/src/main/java/com/alibaba/dubbo/rpc/cluster/directory/AbstractDirectory.java
View File

@ -72,7 +72,7 @@ public abstract class AbstractDirectory<T> implements Directory<T> {
}
List<Invoker<T>> invokers = doList(invocation);
List<Router> localRouters = this.routers; // local reference
if (localRouters != null && localRouters.size() > 0) {
if (localRouters != null && !localRouters.isEmpty()) {
for (Router router : localRouters) {
try {
if (router.getUrl() == null || router.getUrl().getParameter(Constants.RUNTIME_KEY, false)) {

4
dubbo-cluster/src/main/java/com/alibaba/dubbo/rpc/cluster/directory/StaticDirectory.java
View File

@ -45,8 +45,8 @@ public class StaticDirectory<T> extends AbstractDirectory<T> {
}
public StaticDirectory(URL url, List<Invoker<T>> invokers, List<Router> routers) {
super(url == null && invokers != null && invokers.size() > 0 ? invokers.get(0).getUrl() : url, routers);
if (invokers == null || invokers.size() == 0)
super(url == null && invokers != null && !invokers.isEmpty() ? invokers.get(0).getUrl() : url, routers);
if (invokers == null || invokers.isEmpty())
throw new IllegalArgumentException("invokers == null");
this.invokers = invokers;
}

2
dubbo-cluster/src/main/java/com/alibaba/dubbo/rpc/cluster/loadbalance/AbstractLoadBalance.java
View File

@ -36,7 +36,7 @@ public abstract class AbstractLoadBalance implements LoadBalance {
}
public <T> Invoker<T> select(List<Invoker<T>> invokers, URL url, Invocation invocation) {
if (invokers == null || invokers.size() == 0)
if (invokers == null || invokers.isEmpty())
return null;
if (invokers.size() == 1)
return invokers.get(0);

14
dubbo-cluster/src/main/java/com/alibaba/dubbo/rpc/cluster/router/condition/ConditionRouter.java
View File

@ -127,7 +127,7 @@ public class ConditionRouter implements Router, Comparable<Router> {
}
// The Value in the KV part, if Value have more than one items.
else if (",".equals(separator)) { // Should be seperateed by ','
if (values == null || values.size() == 0)
if (values == null || values.isEmpty())
throw new ParseException("Illegal route rule \""
+ rule + "\", The error char '" + separator
+ "' at index " + matcher.start() + " before \""
@ -144,7 +144,7 @@ public class ConditionRouter implements Router, Comparable<Router> {
public <T> List<Invoker<T>> route(List<Invoker<T>> invokers, URL url, Invocation invocation)
throws RpcException {
if (invokers == null || invokers.size() == 0) {
if (invokers == null || invokers.isEmpty()) {
return invokers;
}
try {
@ -161,7 +161,7 @@ public class ConditionRouter implements Router, Comparable<Router> {
result.add(invoker);
}
}
if (result.size() > 0) {
if (!result.isEmpty()) {
return result;
} else if (force) {
logger.warn("The route result is empty and force execute. consumer: " + NetUtils.getLocalHost() + ", service: " + url.getServiceKey() + ", router: " + url.getParameterAndDecoded(Constants.RULE_KEY));
@ -216,7 +216,7 @@ public class ConditionRouter implements Router, Comparable<Router> {
}
} else {
//not pass the condition
if (matchPair.getValue().matches.size() > 0) {
if (!matchPair.getValue().matches.isEmpty()) {
return false;
} else {
result = true;
@ -231,7 +231,7 @@ public class ConditionRouter implements Router, Comparable<Router> {
final Set<String> mismatches = new HashSet<String>();
private boolean isMatch(String value, URL param) {
if (matches.size() > 0 && mismatches.size() == 0) {
if (!matches.isEmpty() && mismatches.isEmpty()) {
for (String match : matches) {
if (UrlUtils.isMatchGlobPattern(match, value, param)) {
return true;
@ -240,7 +240,7 @@ public class ConditionRouter implements Router, Comparable<Router> {
return false;
}
if (mismatches.size() > 0 && matches.size() == 0) {
if (!mismatches.isEmpty() && matches.isEmpty()) {
for (String mismatch : mismatches) {
if (UrlUtils.isMatchGlobPattern(mismatch, value, param)) {
return false;
@ -249,7 +249,7 @@ public class ConditionRouter implements Router, Comparable<Router> {
return true;
}
if (matches.size() > 0 && mismatches.size() > 0) {
if (!matches.isEmpty() && !mismatches.isEmpty()) {
//when both mismatches and matches contain the same value, then using mismatches first
for (String mismatch : mismatches) {
if (UrlUtils.isMatchGlobPattern(mismatch, value, param)) {

16
dubbo-cluster/src/main/java/com/alibaba/dubbo/rpc/cluster/support/AbstractClusterInvoker.java
View File

@ -99,7 +99,7 @@ public abstract class AbstractClusterInvoker<T> implements Invoker<T> {
* @throws RpcExceptione
*/
protected Invoker<T> select(LoadBalance loadbalance, Invocation invocation, List<Invoker<T>> invokers, List<Invoker<T>> selected) throws RpcException {
if (invokers == null || invokers.size() == 0)
if (invokers == null || invokers.isEmpty())
return null;
String methodName = invocation == null ? "" : invocation.getMethodName();
@ -125,12 +125,12 @@ public abstract class AbstractClusterInvoker<T> implements Invoker<T> {
}
private Invoker<T> doselect(LoadBalance loadbalance, Invocation invocation, List<Invoker<T>> invokers, List<Invoker<T>> selected) throws RpcException {
if (invokers == null || invokers.size() == 0)
if (invokers == null || invokers.isEmpty())
return null;
if (invokers.size() == 1)
return invokers.get(0);
// If we only have two invokers, use round-robin instead.
if (invokers.size() == 2 && selected != null && selected.size() > 0) {
if (invokers.size() == 2 && selected != null && !selected.isEmpty()) {
return selected.get(0) == invokers.get(0) ? invokers.get(1) : invokers.get(0);
}
Invoker<T> invoker = loadbalance.select(invokers, getUrl(), invocation);
@ -185,7 +185,7 @@ public abstract class AbstractClusterInvoker<T> implements Invoker<T> {
}
}
}
if (reselectInvokers.size() > 0) {
if (!reselectInvokers.isEmpty()) {
return loadbalance.select(reselectInvokers, getUrl(), invocation);
}
} else { // do not check invoker.isAvailable()
@ -194,7 +194,7 @@ public abstract class AbstractClusterInvoker<T> implements Invoker<T> {
reselectInvokers.add(invoker);
}
}
if (reselectInvokers.size() > 0) {
if (!reselectInvokers.isEmpty()) {
return loadbalance.select(reselectInvokers, getUrl(), invocation);
}
}
@ -208,7 +208,7 @@ public abstract class AbstractClusterInvoker<T> implements Invoker<T> {
}
}
}
if (reselectInvokers.size() > 0) {
if (!reselectInvokers.isEmpty()) {
return loadbalance.select(reselectInvokers, getUrl(), invocation);
}
}
@ -222,7 +222,7 @@ public abstract class AbstractClusterInvoker<T> implements Invoker<T> {
LoadBalance loadbalance;
List<Invoker<T>> invokers = list(invocation);
if (invokers != null && invokers.size() > 0) {
if (invokers != null && !invokers.isEmpty()) {
loadbalance = ExtensionLoader.getExtensionLoader(LoadBalance.class).getExtension(invokers.get(0).getUrl()
.getMethodParameter(invocation.getMethodName(), Constants.LOADBALANCE_KEY, Constants.DEFAULT_LOADBALANCE));
} else {
@ -247,7 +247,7 @@ public abstract class AbstractClusterInvoker<T> implements Invoker<T> {
}
protected void checkInvokers(List<Invoker<T>> invokers, Invocation invocation) {
if (invokers == null || invokers.size() == 0) {
if (invokers == null || invokers.isEmpty()) {
throw new RpcException("Failed to invoke the method "
+ invocation.getMethodName() + " in the service " + getInterface().getName()
+ ". No provider available for the service " + directory.getUrl().getServiceKey()

2
dubbo-cluster/src/main/java/com/alibaba/dubbo/rpc/cluster/support/MergeableClusterInvoker.java
View File

@ -117,7 +117,7 @@ public class MergeableClusterInvoker<T> implements Invoker<T> {
}
}
if (resultList.size() == 0) {
if (resultList.isEmpty()) {
return new RpcResult((Object) null);
} else if (resultList.size() == 1) {
return resultList.iterator().next();

2
dubbo-cluster/src/main/java/com/alibaba/dubbo/rpc/cluster/support/wrapper/MockClusterInvoker.java
View File

@ -98,7 +98,7 @@ public class MockClusterInvoker<T> implements Invoker<T> {
Invoker<T> minvoker;
List<Invoker<T>> mockInvokers = selectMockInvoker(invocation);
if (mockInvokers == null || mockInvokers.size() == 0) {
if (mockInvokers == null || mockInvokers.isEmpty()) {
minvoker = (Invoker<T>) new MockInvoker(directory.getUrl());
} else {
minvoker = mockInvokers.get(0);

2
dubbo-common/src/main/java/com/alibaba/dubbo/common/URL.java
View File

@ -1023,7 +1023,7 @@ public final class URL implements Serializable {
}
public URL removeParameters(Collection<String> keys) {
if (keys == null || keys.size() == 0) {
if (keys == null || keys.isEmpty()) {
return this;
}
return removeParameters(keys.toArray(new String[0]));

6
dubbo-common/src/main/java/com/alibaba/dubbo/common/extension/ExtensionLoader.java
View File

@ -206,7 +206,7 @@ public class ExtensionLoader<T> {
if (!name.startsWith(Constants.REMOVE_VALUE_PREFIX)
&& !names.contains(Constants.REMOVE_VALUE_PREFIX + name)) {
if (Constants.DEFAULT_KEY.equals(name)) {
if (usrs.size() > 0) {
if (!usrs.isEmpty()) {
exts.addAll(0, usrs);
usrs.clear();
}
@ -216,7 +216,7 @@ public class ExtensionLoader<T> {
}
}
}
if (usrs.size() > 0) {
if (!usrs.isEmpty()) {
exts.addAll(usrs);
}
return exts;
@ -495,7 +495,7 @@ public class ExtensionLoader<T> {
}
injectExtension(instance);
Set<Class<?>> wrapperClasses = cachedWrapperClasses;
if (wrapperClasses != null && wrapperClasses.size() > 0) {
if (wrapperClasses != null && !wrapperClasses.isEmpty()) {
for (Class<?> wrapperClass : wrapperClasses) {
instance = injectExtension((T) wrapperClass.getConstructor(type).newInstance(instance));
}

2
dubbo-common/src/main/java/com/alibaba/dubbo/common/extension/factory/SpiExtensionFactory.java
View File

@ -28,7 +28,7 @@ public class SpiExtensionFactory implements ExtensionFactory {
public <T> T getExtension(Class<T> type, String name) {
if (type.isInterface() && type.isAnnotationPresent(SPI.class)) {
ExtensionLoader<T> loader = ExtensionLoader.getExtensionLoader(type);
if (loader.getSupportedExtensions().size() > 0) {
if (!loader.getSupportedExtensions().isEmpty()) {
return loader.getAdaptiveExtension();
}
}

8
dubbo-common/src/main/java/com/alibaba/dubbo/common/utils/CollectionUtils.java
View File

@ -54,7 +54,7 @@ public class CollectionUtils {
@SuppressWarnings({"unchecked", "rawtypes"})
public static <T> List<T> sort(List<T> list) {
if (list != null && list.size() > 0) {
if (list != null && !list.isEmpty()) {
Collections.sort((List) list);
}
return list;
@ -94,7 +94,7 @@ public class CollectionUtils {
return null;
}
Map<String, String> map = new HashMap<String, String>();
if (list == null || list.size() == 0) {
if (list == null || list.isEmpty()) {
return map;
}
for (String item : list) {
@ -199,11 +199,11 @@ public class CollectionUtils {
}
public static boolean isEmpty(Collection<?> collection) {
return collection == null || collection.size() == 0;
return collection == null || collection.isEmpty();
}
public static boolean isNotEmpty(Collection<?> collection) {
return collection != null && collection.size() > 0;
return collection != null && !collection.isEmpty();
}
}

2
dubbo-common/src/main/java/com/alibaba/dubbo/common/utils/ConfigUtils.java
View File

@ -244,7 +244,7 @@ public class ConfigUtils {
logger.warn("Fail to load " + fileName + " file: " + t.getMessage(), t);
}
if (list.size() == 0) {
if (list.isEmpty()) {
if (!optional) {
logger.warn("No " + fileName + " found on the class path.");
}

2
dubbo-common/src/main/java/com/alibaba/dubbo/common/utils/UrlUtils.java
View File

@ -303,7 +303,7 @@ public class UrlUtils {
//compatible for dubbo-2.0.0
public static List<String> revertForbid(List<String> forbid, Set<URL> subscribed) {
if (forbid != null && forbid.size() > 0) {
if (forbid != null && !forbid.isEmpty()) {
List<String> newForbid = new ArrayList<String>();
for (String serviceName : forbid) {
if (!serviceName.contains(":") && !serviceName.contains("/")) {

10
dubbo-config/dubbo-config-api/src/main/java/com/alibaba/dubbo/config/AbstractInterfaceConfig.java
View File

@ -104,7 +104,7 @@ public abstract class AbstractInterfaceConfig extends AbstractMethodConfig {
protected void checkRegistry() {
// for backward compatibility
if (registries == null || registries.size() == 0) {
if (registries == null || registries.isEmpty()) {
String address = ConfigUtils.getProperty("dubbo.registry.address");
if (address != null && address.length() > 0) {
registries = new ArrayList<RegistryConfig>();
@ -116,7 +116,7 @@ public abstract class AbstractInterfaceConfig extends AbstractMethodConfig {
}
}
}
if ((registries == null || registries.size() == 0)) {
if ((registries == null || registries.isEmpty())) {
throw new IllegalStateException((getClass().getSimpleName().startsWith("Reference")
? "No such any registry to refer service in consumer "
: "No such any registry to export service in provider ")
@ -159,7 +159,7 @@ public abstract class AbstractInterfaceConfig extends AbstractMethodConfig {
protected List<URL> loadRegistries(boolean provider) {
checkRegistry();
List<URL> registryList = new ArrayList<URL>();
if (registries != null && registries.size() > 0) {
if (registries != null && !registries.isEmpty()) {
for (RegistryConfig config : registries) {
String address = config.getAddress();
if (address == null || address.length() == 0) {
@ -257,7 +257,7 @@ public abstract class AbstractInterfaceConfig extends AbstractMethodConfig {
throw new IllegalStateException("The interface class " + interfaceClass + " is not a interface!");
}
// check if methods exist in the interface
if (methods != null && methods.size() > 0) {
if (methods != null && !methods.isEmpty()) {
for (MethodConfig methodBean : methods) {
String methodName = methodBean.getName();
if (methodName == null || methodName.length() == 0) {
@ -444,7 +444,7 @@ public abstract class AbstractInterfaceConfig extends AbstractMethodConfig {
}
public RegistryConfig getRegistry() {
return registries == null || registries.size() == 0 ? null : registries.get(0);
return registries == null || registries.isEmpty() ? null : registries.get(0);
}
public void setRegistry(RegistryConfig registry) {

2
dubbo-config/dubbo-config-api/src/main/java/com/alibaba/dubbo/config/AbstractServiceConfig.java
View File

@ -167,7 +167,7 @@ public abstract class AbstractServiceConfig extends AbstractInterfaceConfig {
}
public ProtocolConfig getProtocol() {
return protocols == null || protocols.size() == 0 ? null : protocols.get(0);
return protocols == null || protocols.isEmpty() ? null : protocols.get(0);
}
public void setProtocol(ProtocolConfig protocol) {

2
dubbo-config/dubbo-config-api/src/main/java/com/alibaba/dubbo/config/ApplicationConfig.java
View File

@ -151,7 +151,7 @@ public class ApplicationConfig extends AbstractConfig {
}
public RegistryConfig getRegistry() {
return registries == null || registries.size() == 0 ? null : registries.get(0);
return registries == null || registries.isEmpty() ? null : registries.get(0);
}
public void setRegistry(RegistryConfig registry) {

2
dubbo-config/dubbo-config-api/src/main/java/com/alibaba/dubbo/config/ModuleConfig.java
View File

@ -99,7 +99,7 @@ public class ModuleConfig extends AbstractConfig {
}
public RegistryConfig getRegistry() {
return registries == null || registries.size() == 0 ? null : registries.get(0);
return registries == null || registries.isEmpty() ? null : registries.get(0);
}
public void setRegistry(RegistryConfig registry) {

8
dubbo-config/dubbo-config-api/src/main/java/com/alibaba/dubbo/config/ReferenceConfig.java
View File

@ -148,7 +148,7 @@ public class ReferenceConfig<T> extends AbstractReferenceConfig {
}
public URL toUrl() {
return urls == null || urls.size() == 0 ? null : urls.iterator().next();
return urls == null || urls.isEmpty() ? null : urls.iterator().next();
}
public List<URL> toUrls() {
@ -305,7 +305,7 @@ public class ReferenceConfig<T> extends AbstractReferenceConfig {
appendParameters(map, consumer, Constants.DEFAULT_KEY);
appendParameters(map, this);
String prefix = StringUtils.getServiceKey(map);
if (methods != null && methods.size() > 0) {
if (methods != null && !methods.isEmpty()) {
for (MethodConfig method : methods) {
appendParameters(map, method, method.getName());
String retryKey = method.getName() + ".retry";
@ -376,7 +376,7 @@ public class ReferenceConfig<T> extends AbstractReferenceConfig {
}
} else { // assemble URL from register center's configuration
List<URL> us = loadRegistries(false);
if (us != null && us.size() > 0) {
if (us != null && !us.isEmpty()) {
for (URL u : us) {
URL monitorUrl = loadMonitor(u);
if (monitorUrl != null) {
@ -385,7 +385,7 @@ public class ReferenceConfig<T> extends AbstractReferenceConfig {
urls.add(u.addParameterAndEncoded(Constants.REFER_KEY, StringUtils.toQueryString(map)));
}
}
if (urls == null || urls.size() == 0) {
if (urls == null || urls.isEmpty()) {
throw new IllegalStateException("No such any registry to reference " + interfaceName + " on the consumer " + NetUtils.getLocalHost() + " use dubbo version " + Version.getVersion() + ", please config <dubbo:registry address=\"...\" /> to your spring config.");
}
}

20
dubbo-config/dubbo-config-api/src/main/java/com/alibaba/dubbo/config/ServiceConfig.java
View File

@ -105,7 +105,7 @@ public class ServiceConfig<T> extends AbstractServiceConfig {
@Deprecated
private static final List<ProtocolConfig> convertProviderToProtocol(List<ProviderConfig> providers) {
if (providers == null || providers.size() == 0) {
if (providers == null || providers.isEmpty()) {
return null;
}
List<ProtocolConfig> protocols = new ArrayList<ProtocolConfig>(providers.size());
@ -117,7 +117,7 @@ public class ServiceConfig<T> extends AbstractServiceConfig {
@Deprecated
private static final List<ProviderConfig> convertProtocolToProvider(List<ProtocolConfig> protocols) {
if (protocols == null || protocols.size() == 0) {
if (protocols == null || protocols.isEmpty()) {
return null;
}
List<ProviderConfig> providers = new ArrayList<ProviderConfig>(protocols.size());
@ -175,7 +175,7 @@ public class ServiceConfig<T> extends AbstractServiceConfig {
}
public URL toUrl() {
return urls == null || urls.size() == 0 ? null : urls.iterator().next();
return urls == null || urls.isEmpty() ? null : urls.iterator().next();
}
public List<URL> toUrls() {
@ -337,7 +337,7 @@ public class ServiceConfig<T> extends AbstractServiceConfig {
if (unexported) {
return;
}
if (exporters != null && exporters.size() > 0) {
if (exporters != null && !exporters.isEmpty()) {
for (Exporter<?> exporter : exporters) {
try {
exporter.unexport();
@ -376,7 +376,7 @@ public class ServiceConfig<T> extends AbstractServiceConfig {
appendParameters(map, provider, Constants.DEFAULT_KEY);
appendParameters(map, protocolConfig);
appendParameters(map, this);
if (methods != null && methods.size() > 0) {
if (methods != null && !methods.isEmpty()) {
for (MethodConfig method : methods) {
appendParameters(map, method, method.getName());
String retryKey = method.getName() + ".retry";
@ -387,7 +387,7 @@ public class ServiceConfig<T> extends AbstractServiceConfig {
}
}
List<ArgumentConfig> arguments = method.getArguments();
if (arguments != null && arguments.size() > 0) {
if (arguments != null && !arguments.isEmpty()) {
for (ArgumentConfig argument : arguments) {
// convert argument type
if (argument.getType() != null && argument.getType().length() > 0) {
@ -489,7 +489,7 @@ public class ServiceConfig<T> extends AbstractServiceConfig {
if (logger.isInfoEnabled()) {
logger.info("Export dubbo service " + interfaceClass.getName() + " to url " + url);
}
if (registryURLs != null && registryURLs.size() > 0) {
if (registryURLs != null && !registryURLs.isEmpty()) {
for (URL registryURL : registryURLs) {
url = url.addParameterIfAbsent("dynamic", registryURL.getParameter("dynamic"));
URL monitorUrl = loadMonitor(registryURL);
@ -568,7 +568,7 @@ public class ServiceConfig<T> extends AbstractServiceConfig {
logger.warn(e.getMessage(), e);
}
if (isInvalidLocalHost(hostToBind)) {
if (registryURLs != null && registryURLs.size() > 0) {
if (registryURLs != null && !registryURLs.isEmpty()) {
for (URL registryURL : registryURLs) {
try {
Socket socket = new Socket();
@ -693,12 +693,12 @@ public class ServiceConfig<T> extends AbstractServiceConfig {
}
private void checkProtocol() {
if ((protocols == null || protocols.size() == 0)
if ((protocols == null || protocols.isEmpty())
&& provider != null) {
setProtocols(provider.getProtocols());
}
// backward compatibility
if (protocols == null || protocols.size() == 0) {
if (protocols == null || protocols.isEmpty()) {
setProtocol(new ProtocolConfig());
}
for (ProtocolConfig protocolConfig : protocols) {

8
dubbo-config/dubbo-config-spring/src/main/java/com/alibaba/dubbo/config/spring/ReferenceBean.java
View File

@ -129,9 +129,9 @@ public class ReferenceBean<T> extends ReferenceConfig<T> implements FactoryBean,
}
}
}
if ((getRegistries() == null || getRegistries().size() == 0)
&& (getConsumer() == null || getConsumer().getRegistries() == null || getConsumer().getRegistries().size() == 0)
&& (getApplication() == null || getApplication().getRegistries() == null || getApplication().getRegistries().size() == 0)) {
if ((getRegistries() == null || getRegistries().isEmpty())
&& (getConsumer() == null || getConsumer().getRegistries() == null || getConsumer().getRegistries().isEmpty())
&& (getApplication() == null || getApplication().getRegistries() == null || getApplication().getRegistries().isEmpty())) {
Map<String, RegistryConfig> registryConfigMap = applicationContext == null ? null : BeanFactoryUtils.beansOfTypeIncludingAncestors(applicationContext, RegistryConfig.class, false, false);
if (registryConfigMap != null && registryConfigMap.size() > 0) {
List<RegistryConfig> registryConfigs = new ArrayList<RegistryConfig>();
@ -140,7 +140,7 @@ public class ReferenceBean<T> extends ReferenceConfig<T> implements FactoryBean,
registryConfigs.add(config);
}
}
if (registryConfigs != null && registryConfigs.size() > 0) {
if (registryConfigs != null && !registryConfigs.isEmpty()) {
super.setRegistries(registryConfigs);
}
}

16
dubbo-config/dubbo-config-spring/src/main/java/com/alibaba/dubbo/config/spring/ServiceBean.java
View File

@ -145,7 +145,7 @@ public class ServiceBean<T> extends ServiceConfig<T> implements InitializingBean
providerConfigs.add(config);
}
}
if (providerConfigs.size() > 0) {
if (!providerConfigs.isEmpty()) {
setProviders(providerConfigs);
}
} else {
@ -200,9 +200,9 @@ public class ServiceBean<T> extends ServiceConfig<T> implements InitializingBean
}
}
}
if ((getRegistries() == null || getRegistries().size() == 0)
&& (getProvider() == null || getProvider().getRegistries() == null || getProvider().getRegistries().size() == 0)
&& (getApplication() == null || getApplication().getRegistries() == null || getApplication().getRegistries().size() == 0)) {
if ((getRegistries() == null || getRegistries().isEmpty())
&& (getProvider() == null || getProvider().getRegistries() == null || getProvider().getRegistries().isEmpty())
&& (getApplication() == null || getApplication().getRegistries() == null || getApplication().getRegistries().isEmpty())) {
Map<String, RegistryConfig> registryConfigMap = applicationContext == null ? null : BeanFactoryUtils.beansOfTypeIncludingAncestors(applicationContext, RegistryConfig.class, false, false);
if (registryConfigMap != null && registryConfigMap.size() > 0) {
List<RegistryConfig> registryConfigs = new ArrayList<RegistryConfig>();
@ -211,7 +211,7 @@ public class ServiceBean<T> extends ServiceConfig<T> implements InitializingBean
registryConfigs.add(config);
}
}
if (registryConfigs != null && registryConfigs.size() > 0) {
if (registryConfigs != null && !registryConfigs.isEmpty()) {
super.setRegistries(registryConfigs);
}
}
@ -235,8 +235,8 @@ public class ServiceBean<T> extends ServiceConfig<T> implements InitializingBean
}
}
}
if ((getProtocols() == null || getProtocols().size() == 0)
&& (getProvider() == null || getProvider().getProtocols() == null || getProvider().getProtocols().size() == 0)) {
if ((getProtocols() == null || getProtocols().isEmpty())
&& (getProvider() == null || getProvider().getProtocols() == null || getProvider().getProtocols().isEmpty())) {
Map<String, ProtocolConfig> protocolConfigMap = applicationContext == null ? null : BeanFactoryUtils.beansOfTypeIncludingAncestors(applicationContext, ProtocolConfig.class, false, false);
if (protocolConfigMap != null && protocolConfigMap.size() > 0) {
List<ProtocolConfig> protocolConfigs = new ArrayList<ProtocolConfig>();
@ -245,7 +245,7 @@ public class ServiceBean<T> extends ServiceConfig<T> implements InitializingBean
protocolConfigs.add(config);
}
}
if (protocolConfigs != null && protocolConfigs.size() > 0) {
if (protocolConfigs != null && !protocolConfigs.isEmpty()) {
super.setProtocols(protocolConfigs);
}
}

2
dubbo-filter/dubbo-filter-validation/src/main/java/com/alibaba/dubbo/validation/support/jvalidation/JValidator.java
View File

@ -265,7 +265,7 @@ public class JValidator implements Validator {
validate(violations, arg, classgroups);
}
if (violations.size() > 0) {
if (!violations.isEmpty()) {
logger.error("Failed to validate service: " + clazz.getName() + ", method: " + methodName + ", cause: " + violations);
throw new ConstraintViolationException("Failed to validate service: " + clazz.getName() + ", method: " + methodName + ", cause: " + violations, violations);
}

22
dubbo-registry/dubbo-registry-api/src/main/java/com/alibaba/dubbo/registry/integration/RegistryDirectory.java
View File

@ -123,7 +123,7 @@ public class RegistryDirectory<T> extends AbstractDirectory<T> implements Notify
* @return
*/
public static List<Configurator> toConfigurators(List<URL> urls) {
if (urls == null || urls.size() == 0) {
if (urls == null || urls.isEmpty()) {
return Collections.emptyList();
}
@ -199,11 +199,11 @@ public class RegistryDirectory<T> extends AbstractDirectory<T> implements Notify
}
}
// configurators
if (configuratorUrls != null && configuratorUrls.size() > 0) {
if (configuratorUrls != null && !configuratorUrls.isEmpty()) {
this.configurators = toConfigurators(configuratorUrls);
}
// routers
if (routerUrls != null && routerUrls.size() > 0) {
if (routerUrls != null && !routerUrls.isEmpty()) {
List<Router> routers = toRouters(routerUrls);
if (routers != null) { // null - do nothing
setRouters(routers);
@ -212,7 +212,7 @@ public class RegistryDirectory<T> extends AbstractDirectory<T> implements Notify
List<Configurator> localConfigurators = this.configurators; // local reference
// merge override parameters
this.overrideDirectoryUrl = directoryUrl;
if (localConfigurators != null && localConfigurators.size() > 0) {
if (localConfigurators != null && !localConfigurators.isEmpty()) {
for (Configurator configurator : localConfigurators) {
this.overrideDirectoryUrl = configurator.configure(overrideDirectoryUrl);
}
@ -239,13 +239,13 @@ public class RegistryDirectory<T> extends AbstractDirectory<T> implements Notify
} else {
this.forbidden = false; // Allow to access
Map<String, Invoker<T>> oldUrlInvokerMap = this.urlInvokerMap; // local reference
if (invokerUrls.size() == 0 && this.cachedInvokerUrls != null) {
if (invokerUrls.isEmpty() && this.cachedInvokerUrls != null) {
invokerUrls.addAll(this.cachedInvokerUrls);
} else {
this.cachedInvokerUrls = new HashSet<URL>();
this.cachedInvokerUrls.addAll(invokerUrls);//Cached invoker urls, convenient for comparison
}
if (invokerUrls.size() == 0) {
if (invokerUrls.isEmpty()) {
return;
}
Map<String, Invoker<T>> newUrlInvokerMap = toInvokers(invokerUrls);// Translate url list to Invoker map
@ -303,10 +303,10 @@ public class RegistryDirectory<T> extends AbstractDirectory<T> implements Notify
*/
private List<Router> toRouters(List<URL> urls) {
List<Router> routers = new ArrayList<Router>();
if (urls == null || urls.size() < 1) {
if (urls == null || urls.isEmpty()) {
return routers;
}
if (urls != null && urls.size() > 0) {
if (urls != null && !urls.isEmpty()) {
for (URL url : urls) {
if (Constants.EMPTY_PROTOCOL.equals(url.getProtocol())) {
continue;
@ -335,7 +335,7 @@ public class RegistryDirectory<T> extends AbstractDirectory<T> implements Notify
*/
private Map<String, Invoker<T>> toInvokers(List<URL> urls) {
Map<String, Invoker<T>> newUrlInvokerMap = new HashMap<String, Invoker<T>>();
if (urls == null || urls.size() == 0) {
if (urls == null || urls.isEmpty()) {
return newUrlInvokerMap;
}
Set<String> keys = new HashSet<String>();
@ -408,7 +408,7 @@ public class RegistryDirectory<T> extends AbstractDirectory<T> implements Notify
providerUrl = ClusterUtils.mergeUrl(providerUrl, queryMap); // Merge the consumer side parameters
List<Configurator> localConfigurators = this.configurators; // local reference
if (localConfigurators != null && localConfigurators.size() > 0) {
if (localConfigurators != null && !localConfigurators.isEmpty()) {
for (Configurator configurator : localConfigurators) {
providerUrl = configurator.configure(providerUrl);
}
@ -488,7 +488,7 @@ public class RegistryDirectory<T> extends AbstractDirectory<T> implements Notify
if (serviceMethods != null && serviceMethods.length > 0) {
for (String method : serviceMethods) {
List<Invoker<T>> methodInvokers = newMethodInvokerMap.get(method);
if (methodInvokers == null || methodInvokers.size() == 0) {
if (methodInvokers == null || methodInvokers.isEmpty()) {
methodInvokers = newInvokersList;
}
newMethodInvokerMap.put(method, route(methodInvokers, method));

2
dubbo-registry/dubbo-registry-api/src/main/java/com/alibaba/dubbo/registry/status/RegistryStatusChecker.java
View File

@ -33,7 +33,7 @@ public class RegistryStatusChecker implements StatusChecker {
public Status check() {
Collection<Registry> regsitries = AbstractRegistryFactory.getRegistries();
if (regsitries == null || regsitries.size() == 0) {
if (regsitries == null || regsitries.isEmpty()) {
return new Status(Status.Level.UNKNOWN);
}
Status.Level level = Status.Level.OK;

6
dubbo-registry/dubbo-registry-api/src/main/java/com/alibaba/dubbo/registry/support/AbstractRegistry.java
View File

@ -98,7 +98,7 @@ public abstract class AbstractRegistry implements Registry {
}
protected static List<URL> filterEmpty(URL url, List<URL> urls) {
if (urls == null || urls.size() == 0) {
if (urls == null || urls.isEmpty()) {
List<URL> result = new ArrayList<URL>(1);
result.add(url.setProtocol(Constants.EMPTY_PROTOCOL));
return result;
@ -253,7 +253,7 @@ public abstract class AbstractRegistry implements Registry {
};
subscribe(url, listener); // Subscribe logic guarantees the first notify to return
List<URL> urls = reference.get();
if (urls != null && urls.size() > 0) {
if (urls != null && !urls.isEmpty()) {
for (URL u : urls) {
if (!Constants.EMPTY_PROTOCOL.equals(u.getProtocol())) {
result.add(u);
@ -374,7 +374,7 @@ public abstract class AbstractRegistry implements Registry {
if (listener == null) {
throw new IllegalArgumentException("notify listener == null");
}
if ((urls == null || urls.size() == 0)
if ((urls == null || urls.isEmpty())
&& !Constants.ANY_VALUE.equals(url.getServiceInterface())) {
logger.warn("Ignore empty notify urls for subscribe url " + url);
return;

6
dubbo-registry/dubbo-registry-api/src/main/java/com/alibaba/dubbo/registry/support/FailbackRegistry.java
View File

@ -203,7 +203,7 @@ public abstract class FailbackRegistry extends AbstractRegistry {
Throwable t = e;
List<URL> urls = getCacheUrls(url);
if (urls != null && urls.size() > 0) {
if (urls != null && !urls.isEmpty()) {
notify(url, listener, urls);
logger.error("Failed to subscribe " + url + ", Using cached list: " + urls + " from cache file: " + getUrl().getParameter(Constants.FILE_KEY, System.getProperty("user.home") + "/dubbo-registry-" + url.getHost() + ".cache") + ", cause: " + t.getMessage(), t);
} else {
@ -339,7 +339,7 @@ public abstract class FailbackRegistry extends AbstractRegistry {
}
if (!failedUnregistered.isEmpty()) {
Set<URL> failed = new HashSet<URL>(failedUnregistered);
if (failed.size() > 0) {
if (!failed.isEmpty()) {
if (logger.isInfoEnabled()) {
logger.info("Retry unregister " + failed);
}
@ -389,7 +389,7 @@ public abstract class FailbackRegistry extends AbstractRegistry {
if (!failedUnsubscribed.isEmpty()) {
Map<URL, Set<NotifyListener>> failed = new HashMap<URL, Set<NotifyListener>>(failedUnsubscribed);
for (Map.Entry<URL, Set<NotifyListener>> entry : new HashMap<URL, Set<NotifyListener>>(failed).entrySet()) {
if (entry.getValue() == null || entry.getValue().size() == 0) {
if (entry.getValue() == null || entry.getValue().isEmpty()) {
failed.remove(entry.getKey());
}
}

10
dubbo-registry/dubbo-registry-multicast/src/main/java/com/alibaba/dubbo/registry/multicast/MulticastRegistry.java
View File

@ -210,7 +210,7 @@ public class MulticastRegistry extends FailbackRegistry {
} else if (msg.startsWith(Constants.SUBSCRIBE)) {
URL url = URL.valueOf(msg.substring(Constants.SUBSCRIBE.length()).trim());
Set<URL> urls = getRegistered();
if (urls != null && urls.size() > 0) {
if (urls != null && !urls.isEmpty()) {
for (URL u : urls) {
if (UrlUtils.isMatch(url, u)) {
String host = remoteAddress != null && remoteAddress.getAddress() != null
@ -359,7 +359,7 @@ public class MulticastRegistry extends FailbackRegistry {
private List<URL> toList(Set<URL> urls) {
List<URL> list = new ArrayList<URL>();
if (urls != null && urls.size() > 0) {
if (urls != null && !urls.isEmpty()) {
for (URL url : urls) {
list.add(url);
}
@ -395,13 +395,13 @@ public class MulticastRegistry extends FailbackRegistry {
urls.addAll(values);
}
}
if (urls == null || urls.size() == 0) {
if (urls == null || urls.isEmpty()) {
List<URL> cacheUrls = getCacheUrls(url);
if (cacheUrls != null && cacheUrls.size() > 0) {
if (cacheUrls != null && !cacheUrls.isEmpty()) {
urls.addAll(cacheUrls);
}
}
if (urls == null || urls.size() == 0) {
if (urls == null || urls.isEmpty()) {
for (URL u : getRegistered()) {
if (UrlUtils.isMatch(url, u)) {
urls.add(u);

12
dubbo-registry/dubbo-registry-redis/src/main/java/com/alibaba/dubbo/registry/redis/RedisRegistry.java
View File

@ -194,7 +194,7 @@ public class RedisRegistry extends FailbackRegistry {
// The monitoring center is responsible for deleting outdated dirty data
private void clean(Jedis jedis) {
Set<String> keys = jedis.keys(root + Constants.ANY_VALUE);
if (keys != null && keys.size() > 0) {
if (keys != null && !keys.isEmpty()) {
for (String key : keys) {
Map<String, String> values = jedis.hgetAll(key);
if (values != null && values.size() > 0) {
@ -352,7 +352,7 @@ public class RedisRegistry extends FailbackRegistry {
if (service.endsWith(Constants.ANY_VALUE)) {
admin = true;
Set<String> keys = jedis.keys(service);
if (keys != null && keys.size() > 0) {
if (keys != null && !keys.isEmpty()) {
Map<String, Set<String>> serviceKeys = new HashMap<String, Set<String>>();
for (String key : keys) {
String serviceKey = toServicePath(key);
@ -399,8 +399,8 @@ public class RedisRegistry extends FailbackRegistry {
}
private void doNotify(Jedis jedis, Collection<String> keys, URL url, Collection<NotifyListener> listeners) {
if (keys == null || keys.size() == 0
|| listeners == null || listeners.size() == 0) {
if (keys == null || keys.isEmpty()
|| listeners == null || listeners.isEmpty()) {
return;
}
long now = System.currentTimeMillis();
@ -442,7 +442,7 @@ public class RedisRegistry extends FailbackRegistry {
logger.info("redis notify: " + key + " = " + urls);
}
}
if (result == null || result.size() == 0) {
if (result == null || result.isEmpty()) {
return;
}
for (NotifyListener listener : listeners) {
@ -584,7 +584,7 @@ public class RedisRegistry extends FailbackRegistry {
if (!first) {
first = false;
Set<String> keys = jedis.keys(service);
if (keys != null && keys.size() > 0) {
if (keys != null && !keys.isEmpty()) {
for (String s : keys) {
doNotify(jedis, s);
}

4
dubbo-registry/dubbo-registry-zookeeper/src/main/java/com/alibaba/dubbo/registry/zookeeper/ZookeeperRegistry.java
View File

@ -148,7 +148,7 @@ public class ZookeeperRegistry extends FailbackRegistry {
}
zkClient.create(root, false);
List<String> services = zkClient.addChildListener(root, zkListener);
if (services != null && services.size() > 0) {
if (services != null && !services.isEmpty()) {
for (String service : services) {
service = URL.decode(service);
anyServices.add(service);
@ -258,7 +258,7 @@ public class ZookeeperRegistry extends FailbackRegistry {
private List<URL> toUrlsWithoutEmpty(URL consumer, List<String> providers) {
List<URL> urls = new ArrayList<URL>();
if (providers != null && providers.size() > 0) {
if (providers != null && !providers.isEmpty()) {
for (String provider : providers) {
provider = URL.decode(provider);
if (provider.contains("://")) {

2
dubbo-remoting/dubbo-remoting-api/src/main/java/com/alibaba/dubbo/remoting/exchange/support/header/HeaderExchangeServer.java
View File

@ -154,7 +154,7 @@ public class HeaderExchangeServer implements ExchangeServer {
public Collection<ExchangeChannel> getExchangeChannels() {
Collection<ExchangeChannel> exchangeChannels = new ArrayList<ExchangeChannel>();
Collection<Channel> channels = server.getChannels();
if (channels != null && channels.size() > 0) {
if (channels != null && !channels.isEmpty()) {
for (Channel channel : channels) {
exchangeChannels.add(HeaderExchangeChannel.getOrAddChannel(channel));
}

6
dubbo-remoting/dubbo-remoting-api/src/main/java/com/alibaba/dubbo/remoting/telnet/codec/TelnetCodec.java
View File

@ -189,7 +189,7 @@ public class TelnetCodec extends TransportCodec {
boolean down = endsWith(message, DOWN);
if (up || down) {
LinkedList<String> history = (LinkedList<String>) channel.getAttribute(HISTORY_LIST_KEY);
if (history == null || history.size() == 0) {
if (history == null || history.isEmpty()) {
return DecodeResult.NEED_MORE_INPUT;
}
Integer index = (Integer) channel.getAttribute(HISTORY_INDEX_KEY);
@ -256,7 +256,7 @@ public class TelnetCodec extends TransportCodec {
LinkedList<String> history = (LinkedList<String>) channel.getAttribute(HISTORY_LIST_KEY);
Integer index = (Integer) channel.getAttribute(HISTORY_INDEX_KEY);
channel.removeAttribute(HISTORY_INDEX_KEY);
if (history != null && history.size() > 0 && index != null && index >= 0 && index < history.size()) {
if (history != null && !history.isEmpty() && index != null && index >= 0 && index < history.size()) {
String value = history.get(index);
if (value != null) {
byte[] b1 = value.getBytes();
@ -276,7 +276,7 @@ public class TelnetCodec extends TransportCodec {
history = new LinkedList<String>();
channel.setAttribute(HISTORY_LIST_KEY, history);
}
if (history.size() == 0) {
if (history.isEmpty()) {
history.addLast(result);
} else if (!result.equals(history.getLast())) {
history.remove(result);

2
dubbo-remoting/dubbo-remoting-api/src/main/java/com/alibaba/dubbo/remoting/telnet/support/command/HelpTelnetHandler.java
View File

@ -53,7 +53,7 @@ public class HelpTelnetHandler implements TelnetHandler {
} else {
List<List<String>> table = new ArrayList<List<String>>();
List<TelnetHandler> handlers = extensionLoader.getActivateExtension(channel.getUrl(), "telnet");
if (handlers != null && handlers.size() > 0) {
if (handlers != null && !handlers.isEmpty()) {
for (TelnetHandler handler : handlers) {
Help help = handler.getClass().getAnnotation(Help.class);
List<String> row = new ArrayList<String>();

2
dubbo-remoting/dubbo-remoting-api/src/main/java/com/alibaba/dubbo/remoting/telnet/support/command/StatusTelnetHandler.java
View File

@ -47,7 +47,7 @@ public class StatusTelnetHandler implements TelnetHandler {
String[] header = new String[]{"resource", "status", "message"};
List<List<String>> table = new ArrayList<List<String>>();
Map<String, Status> statuses = new HashMap<String, Status>();
if (checkers != null && checkers.size() > 0) {
if (checkers != null && !checkers.isEmpty()) {
for (StatusChecker checker : checkers) {
String name = extensionLoader.getExtensionName(checker);
Status stat;

2
dubbo-remoting/dubbo-remoting-api/src/main/java/com/alibaba/dubbo/remoting/transport/AbstractServer.java
View File

@ -196,7 +196,7 @@ public abstract class AbstractServer extends AbstractEndpoint implements Server
@Override
public void disconnected(Channel ch) throws RemotingException {
Collection<Channel> channels = getChannels();
if (channels.size() == 0) {
if (channels.isEmpty()) {
logger.warn("All clients has discontected from " + ch.getLocalAddress() + ". You can graceful shutdown now.");
}
super.disconnected(ch);

2
dubbo-remoting/dubbo-remoting-api/src/main/java/com/alibaba/dubbo/remoting/transport/ChannelHandlerDispatcher.java
View File

@ -42,7 +42,7 @@ public class ChannelHandlerDispatcher implements ChannelHandler {
}
public ChannelHandlerDispatcher(Collection<ChannelHandler> handlers) {
if (handlers != null && handlers.size() > 0) {
if (handlers != null && !handlers.isEmpty()) {
this.channelHandlers.addAll(handlers);
}
}

2
dubbo-remoting/dubbo-remoting-netty/src/main/java/com/alibaba/dubbo/remoting/transport/netty/NettyServer.java
View File

@ -104,7 +104,7 @@ public class NettyServer extends AbstractServer implements Server {
}
try {
Collection<com.alibaba.dubbo.remoting.Channel> channels = getChannels();
if (channels != null && channels.size() > 0) {
if (channels != null && !channels.isEmpty()) {
for (com.alibaba.dubbo.remoting.Channel channel : channels) {
try {
channel.close();

2
dubbo-rpc/dubbo-rpc-api/src/main/java/com/alibaba/dubbo/rpc/RpcContext.java
View File

@ -557,7 +557,7 @@ public class RpcContext {
public RpcContext setInvokers(List<Invoker<?>> invokers) {
this.invokers = invokers;
if (invokers != null && invokers.size() > 0) {
if (invokers != null && !invokers.isEmpty()) {
List<URL> urls = new ArrayList<URL>(invokers.size());
for (Invoker<?> invoker : invokers) {
urls.add(invoker.getUrl());

4
dubbo-rpc/dubbo-rpc-api/src/main/java/com/alibaba/dubbo/rpc/listener/ListenerExporterWrapper.java
View File

@ -41,7 +41,7 @@ public class ListenerExporterWrapper<T> implements Exporter<T> {
}
this.exporter = exporter;
this.listeners = listeners;
if (listeners != null && listeners.size() > 0) {
if (listeners != null && !listeners.isEmpty()) {
RuntimeException exception = null;
for (ExporterListener listener : listeners) {
if (listener != null) {
@ -67,7 +67,7 @@ public class ListenerExporterWrapper<T> implements Exporter<T> {
try {
exporter.unexport();
} finally {
if (listeners != null && listeners.size() > 0) {
if (listeners != null && !listeners.isEmpty()) {
RuntimeException exception = null;
for (ExporterListener listener : listeners) {
if (listener != null) {

4
dubbo-rpc/dubbo-rpc-api/src/main/java/com/alibaba/dubbo/rpc/listener/ListenerInvokerWrapper.java
View File

@ -44,7 +44,7 @@ public class ListenerInvokerWrapper<T> implements Invoker<T> {
}
this.invoker = invoker;
this.listeners = listeners;
if (listeners != null && listeners.size() > 0) {
if (listeners != null && !listeners.isEmpty()) {
for (InvokerListener listener : listeners) {
if (listener != null) {
try {
@ -82,7 +82,7 @@ public class ListenerInvokerWrapper<T> implements Invoker<T> {
try {
invoker.destroy();
} finally {
if (listeners != null && listeners.size() > 0) {
if (listeners != null && !listeners.isEmpty()) {
for (InvokerListener listener : listeners) {
if (listener != null) {
try {

2
dubbo-rpc/dubbo-rpc-api/src/main/java/com/alibaba/dubbo/rpc/protocol/ProtocolFilterWrapper.java
View File

@ -46,7 +46,7 @@ public class ProtocolFilterWrapper implements Protocol {
private static <T> Invoker<T> buildInvokerChain(final Invoker<T> invoker, String key, String group) {
Invoker<T> last = invoker;
List<Filter> filters = ExtensionLoader.getExtensionLoader(Filter.class).getActivateExtension(invoker.getUrl(), key, group);
if (filters.size() > 0) {
if (!filters.isEmpty()) {
for (int i = filters.size() - 1; i >= 0; i--) {
final Filter filter = filters.get(i);
final Invoker<T> next = last;

4
dubbo-rpc/dubbo-rpc-default/src/main/java/com/alibaba/dubbo/rpc/protocol/dubbo/filter/TraceFilter.java
View File

@ -79,11 +79,11 @@ public class TraceFilter implements Filter {
if (tracers.size() > 0) {
String key = invoker.getInterface().getName() + "." + invocation.getMethodName();
Set<Channel> channels = tracers.get(key);
if (channels == null || channels.size() == 0) {
if (channels == null || channels.isEmpty()) {
key = invoker.getInterface().getName();
channels = tracers.get(key);
}
if (channels != null && channels.size() > 0) {
if (channels != null && !channels.isEmpty()) {
for (Channel channel : new ArrayList<Channel>(channels)) {
if (channel.isConnected()) {
try {

2
dubbo-rpc/dubbo-rpc-default/src/main/java/com/alibaba/dubbo/rpc/protocol/dubbo/status/ServerStatusChecker.java
View File

@ -32,7 +32,7 @@ public class ServerStatusChecker implements StatusChecker {
public Status check() {
Collection<ExchangeServer> servers = DubboProtocol.getDubboProtocol().getServers();
if (servers == null || servers.size() == 0) {
if (servers == null || servers.isEmpty()) {
return new Status(Status.Level.UNKNOWN);
}
Status.Level level = Status.Level.OK;