Relax restrictions on minimum memory (#689)

Improve #682

Change-Id: I92ae91b0ab5076566fcbbe10d4d48122ffd9dde5

hugegraph-api/src/main/java/com/baidu/hugegraph/api/filter/LoadDetectFilter.java

@@ -34,7 +34,6 @@ import javax.ws.rs.ext.Provider;
 import com.baidu.hugegraph.config.HugeConfig;
 import com.baidu.hugegraph.config.ServerOptions;
 import com.baidu.hugegraph.define.WorkLoad;
-import com.baidu.hugegraph.license.LicenseVerifier;
 import com.baidu.hugegraph.util.Bytes;
 import com.baidu.hugegraph.util.E;
 import com.google.common.collect.ImmutableSet;
@@ -63,8 +62,6 @@ public class LoadDetectFilter implements ContainerRequestFilter {
 
     @Override
     public void filter(ContainerRequestContext context) {
-        LicenseVerifier.instance().verifyIfNeeded();
-
         if (LoadDetectFilter.isWhiteAPI(context)) {
             return;
         }

hugegraph-api/src/main/java/com/baidu/hugegraph/config/ServerOptions.java

@@ -70,19 +70,19 @@ public class ServerOptions extends OptionHolder {
                     "The minmium free memory(MB) of rest server, requests " +
                     "will be rejected when the available memory of system " +
                     "is lower than this value.",
-                    positiveInt(),
-                    256
+                    nonNegativeInt(),
+                    64
             );
 
 
     public static final ConfigOption<Integer> REQUEST_TIMEOUT =
-        new ConfigOption<>(
-                "restserver.request_timeout",
-                "The time in seconds within which a request must complete, " +
-                "-1 means no timeout.",
-                rangeInt(-1, Integer.MAX_VALUE),
-                30
-        );
+            new ConfigOption<>(
+                    "restserver.request_timeout",
+                    "The time in seconds within which a request must complete, " +
+                    "-1 means no timeout.",
+                    rangeInt(-1, Integer.MAX_VALUE),
+                    30
+            );
 
     public static final ConfigOption<Integer> CONN_IDLE_TIMEOUT =
             new ConfigOption<>(

hugegraph-api/src/main/java/com/baidu/hugegraph/core/GraphManager.java

@@ -72,7 +72,7 @@ public final class GraphManager {
         }
 
         this.loadGraphs(conf.getMap(ServerOptions.GRAPHS));
-        this.installLicense(conf);
+        // this.installLicense(conf);
         this.checkBackendVersionOrExit();
         this.restoreUncompletedTasks();
         this.addMetrics(conf);

hugegraph-core/src/main/java/com/baidu/hugegraph/backend/tx/GraphIndexTransaction.java

@@ -591,7 +591,7 @@ public class GraphIndexTransaction extends AbstractTransaction {
                                              ConditionQuery query) {
         SchemaTransaction schema = this.graph().schemaTransaction();
         Set<IndexLabel> ils = InsertionOrderUtil.newSet();
-        for(Id il : schemaLabel.indexLabels()) {
+        for (Id il : schemaLabel.indexLabels()) {
             ils.add(schema.getIndexLabel(il));
         }
         if (ils.isEmpty()) {
@@ -753,7 +753,7 @@ public class GraphIndexTransaction extends AbstractTransaction {
             }
         }
         // Must match all fields
-        if(indexFields.equals(queryPropKeys)) {
+        if (indexFields.equals(queryPropKeys)) {
             return matchedIndexLabels;
         } else {
             return ImmutableSet.of();

hugegraph-core/src/main/java/com/baidu/hugegraph/structure/HugeFeatures.java

@@ -149,7 +149,7 @@ public class HugeFeatures implements Graph.Features {
 
         @Override
         public boolean willAllowId(Object id) {
-            if(!this.supportsUserSuppliedIds()) {
+            if (!this.supportsUserSuppliedIds()) {
                 return false;
             } else {
                 return this.supportsAnyIds() ||

hugegraph-core/src/main/java/com/baidu/hugegraph/traversal/optimize/HugeScriptTraversal.java

@@ -83,7 +83,7 @@ public final class HugeScriptTraversal<S, E> extends DefaultTraversal<S, E> {
                                       .withStrategies(strategies));
         bindings.put("graph", this.graph);
 
-        for(Map.Entry<String, String> entry : this.aliases.entrySet()) {
+        for (Map.Entry<String, String> entry : this.aliases.entrySet()) {
             Object value = bindings.get(entry.getValue());
             if (value == null) {
                 throw new IllegalArgumentException(String.format(

hugegraph-palo/src/main/java/com/baidu/hugegraph/backend/store/palo/PaloSessions.java

@@ -306,7 +306,7 @@ public class PaloSessions extends MysqlSessions {
             Lock lock = PaloSessions.this.locks.get(sessionId).writeLock();
             lock.lock();
             try {
-                String table = file.table();;
+                String table = file.table();
                 String data = file.readAsString();
                 String label = this.formatLabel(table);
                 this.client.bulkLoadAsync(table, data, label);

hugegraph-test/src/main/java/com/baidu/hugegraph/unit/serializer/BytesBufferTest.java

@@ -786,7 +786,7 @@ public class BytesBufferTest extends BaseUnitTest {
         Assert.assertEquals(value, BytesBuffer.wrap(bytes).readProperty(pkey));
 
         pkey = genListPkey(DataType.INT);
-        value = ImmutableList.of(127, 128);;
+        value = ImmutableList.of(127, 128);
         bytes = genBytes("027f8100");
         buf.flip();
         Assert.assertArrayEquals(bytes, buf.writeProperty(pkey, value).bytes());
@@ -890,7 +890,7 @@ public class BytesBufferTest extends BaseUnitTest {
         Assert.assertEquals(value, BytesBuffer.wrap(bytes).readProperty(pkey));
 
         pkey = genSetPkey(DataType.INT);
-        value = ImmutableSet.of(127, 128);;
+        value = ImmutableSet.of(127, 128);
         bytes = genBytes("027f8100");
         buf.flip();
         Assert.assertArrayEquals(bytes, buf.writeProperty(pkey, value).bytes());