me.prettyprint.cassandra.service

Class Operation<T>

java.lang.Object

me.prettyprint.cassandra.service.Operation<T>

Type Parameters:

T - The result type of the operation (if it has a result), such as the result of get_count or get_column Oh closures, how I wish you were here...

Direct Known Subclasses:

VirtualKeyspaceOperation

public abstract class Operation<T>
extends Object

Defines an operation performed on cassandra

Field Summary

Fields

Modifier and Type	Field and Description
ConsistencyLevelPolicy	consistencyLevelPolicy
Map<String,String>	credentials
protected long	execTime
CassandraClientMonitor.Counter	failCounter Counts failed attempts
FailoverPolicy	failoverPolicy
String	keyspaceName
OperationType	operationType
protected T	result
String	stopWatchTagName The stopwatch used to measure operation performance

Constructor Summary

Constructors

Constructor and Description
Operation(OperationType operationType)
Operation(OperationType operationType, FailoverPolicy failoverPolicy, Map<String,String> credentials)
Operation(OperationType operationType, FailoverPolicy failoverPolicy, String keyspaceName, Map<String,String> credentials)
Operation(OperationType operationType, Map<String,String> credentials)

Method Summary

Methods

Modifier and Type	Method and Description
void	applyConnectionParams(String keyspace, ConsistencyLevelPolicy consistencyLevelPolicy, FailoverPolicy failoverPolicy, Map<String,String> credentials)
abstract T	execute(org.apache.cassandra.thrift.Cassandra.Client cassandra) Performs the operation on the given cassandra instance.
void	executeAndSetResult(org.apache.cassandra.thrift.Cassandra.Client cassandra, CassandraHost cassandraHost)
CassandraHost	getCassandraHost()
HectorException	getException()
ExecutionResult<T>	getExecutionResult()
T	getResult()
boolean	hasException()
void	setException(HectorException e)
void	setResult(T executionResult)

Methods inherited from class java.lang.Object

clone, equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait

Field Detail

failCounter

public final CassandraClientMonitor.Counter failCounter

Counts failed attempts

stopWatchTagName

public final String stopWatchTagName

The stopwatch used to measure operation performance

failoverPolicy

public FailoverPolicy failoverPolicy

consistencyLevelPolicy

public ConsistencyLevelPolicy consistencyLevelPolicy

keyspaceName

public String keyspaceName

credentials

public Map<String,String> credentials

result

protected T result

execTime

protected long execTime

operationType

public final OperationType operationType

Constructor Detail

Operation

public Operation(OperationType operationType)

Operation

public Operation(OperationType operationType,
         Map<String,String> credentials)

Operation

public Operation(OperationType operationType,
         FailoverPolicy failoverPolicy,
         Map<String,String> credentials)

Operation

public Operation(OperationType operationType,
         FailoverPolicy failoverPolicy,
         String keyspaceName,
         Map<String,String> credentials)

Method Detail

applyConnectionParams

public void applyConnectionParams(String keyspace,
                         ConsistencyLevelPolicy consistencyLevelPolicy,
                         FailoverPolicy failoverPolicy,
                         Map<String,String> credentials)

setResult

public void setResult(T executionResult)

getResult

public T getResult()

Returns:

The result of the operation, if this is an operation that has a result (such as getColumn etc.

getExecutionResult

public ExecutionResult<T> getExecutionResult()

execute

public abstract T execute(org.apache.cassandra.thrift.Cassandra.Client cassandra)
                   throws Exception

Performs the operation on the given cassandra instance.

Throws:

Exception

executeAndSetResult

public void executeAndSetResult(org.apache.cassandra.thrift.Cassandra.Client cassandra,
                       CassandraHost cassandraHost)
                         throws Exception

Throws:

Exception

setException

public void setException(HectorException e)

hasException

public boolean hasException()

getException

public HectorException getException()

getCassandraHost

public CassandraHost getCassandraHost()