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fix cli value conversion, update readme 

patch by Pavel Yaskevich and jbellis for CASSANDRA-1635

git-svn-id: https://svn.apache.org/repos/asf/cassandra/trunk@1025705 13f79535-47bb-0310-9956-ffa450edef68
This commit is contained in:
Jonathan Ellis 2010-10-20 20:15:27 +00:00
parent fad1f92bdb
commit da5a3dfeba
2 changed files with 34 additions and 21 deletions
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44
README.txt
View File

@ -43,45 +43,51 @@ remain in the foreground and log to standard out.
Now let's try to read and write some data using the command line client.
* bin/cassandra-cli --host localhost --port 9160
* bin/cassandra-cli --host localhost
The command line client is interactive so if everything worked you should
be sitting in front of a prompt...
Connected to localhost/9160
Connected to: "Test Cluster" on localhost/9160
Welcome to cassandra CLI.
Type 'help' or '?' for help. Type 'quit' or 'exit' to quit.
cassandra>
[default@unknown]
As the banner says, you can use 'help' or '?' to see what the CLI has to
offer, and 'quit' or 'exit' when you've had enough fun. But lets try
something slightly more interesting...
cassandra> set Keyspace1.Standard2['jsmith']['first'] = 'John'
[default@unknown] create keyspace Keyspace1
ece86bde-dc55-11df-8240-e700f669bcfc
[default@unknown] use Keyspace1
Authenticated to keyspace: Keyspace1
[default@Keyspace1] create column family Users with comparator=UTF8Type
737c7a71-dc56-11df-8240-e700f669bcfc
[default@KS1] set Users[jsmith][first] = 'John'
Value inserted.
cassandra> set Keyspace1.Standard2['jsmith']['last'] = 'Smith'
[default@KS1] set Users[jsmith][last] = 'Smith'
Value inserted.
cassandra> set Keyspace1.Standard2['jsmith']['age'] = '42'
[default@KS1] set Users[jsmith][age] = long(42)
Value inserted.
cassandra> get Keyspace1.Standard2['jsmith']
(column=age, value=42; timestamp=1249930062801)
(column=first, value=John; timestamp=1249930053103)
(column=last, value=Smith; timestamp=1249930058345)
Returned 3 rows.
cassandra>
[default@KS1] get Users[jsmith]
=> (column=last, value=Smith, timestamp=1287604215498000)
=> (column=first, value=John, timestamp=1287604214111000)
=> (column=age, value=42, timestamp=1287604216661000)
Returned 3 results.
If your session looks similar to what's above, congrats, your single node
cluster is operational! But what exactly was all of that? Let's break it
down into pieces and see.
set Keyspace1.Standard2['jsmith']['first'] = 'John'
\ \ \ \ \
\ \ \_ key \ \_ value
\ \ \_ column
\_ keyspace \_ column family
set Users[jsmith][first] = 'John'
\ \ \ \
\ \_ key \ \_ value
\ \_ column
\_ column family
Data stored in Cassandra is associated with a column family (Standard2),
Data stored in Cassandra is associated with a column family (Users),
which in turn is associated with a keyspace (Keyspace1). In the example
above, we set the value 'John' in the 'first' column for key 'jsmith'.

11
src/java/org/apache/cassandra/cli/CliClient.java
View File

@ -597,6 +597,9 @@ public class CliClient
new ColumnParent(columnFamily).setSuper_column(superColumnName),
new SlicePredicate().setColumn_names(null).setSlice_range(range), ConsistencyLevel.ONE);
int size = columns.size();
AbstractType validator;
CfDef cfDef = getCfDef(columnFamily);
// Print out super columns or columns.
for (ColumnOrSuperColumn cosc : columns)
@ -607,16 +610,20 @@ public class CliClient
css_.out.printf("=> (super_column=%s,", formatSuperColumnName(keyspace, columnFamily, superColumn));
for (Column col : superColumn.getColumns())
{
validator = getValidatorForValue(cfDef, col.getName());
css_.out.printf("\n (column=%s, value=%s, timestamp=%d)", formatSubcolumnName(keyspace, columnFamily, col),
new String(col.value, "UTF-8"), col.timestamp);
validator.getString(col.value), col.timestamp);
}
css_.out.println(")");
}
else
{
Column column = cosc.column;
validator = getValidatorForValue(cfDef, column.getName());
css_.out.printf("=> (column=%s, value=%s, timestamp=%d)\n", formatColumnName(keyspace, columnFamily, column),
new String(column.value, "UTF-8"), column.timestamp);
validator.getString(column.value), column.timestamp);
}
}