org.apache.flume.channel.recoverable.memory
Class RecoverableMemoryChannel

java.lang.Object
  extended by org.apache.flume.channel.AbstractChannel
      extended by org.apache.flume.channel.BasicChannelSemantics
          extended by org.apache.flume.channel.recoverable.memory.RecoverableMemoryChannel
All Implemented Interfaces:
Channel, Configurable, LifecycleAware, NamedComponent

public class RecoverableMemoryChannel
extends BasicChannelSemantics

A durable Channel implementation that uses the local file system for its storage.


Field Summary
static String WAL_DATA_DIR
           
static String WAL_MAX_LOGS_SIZE
           
static String WAL_MIN_RENTENTION_PERIOD
           
static String WAL_ROLL_SIZE
           
static String WAL_WORKER_INTERVAL
           
 
Constructor Summary
RecoverableMemoryChannel()
           
 
Method Summary
 void configure(Context context)
           Request the implementing class to (re)configure itself.
protected  BasicTransactionSemantics createTransaction()
           Called to create new Transaction objects, which must extend BasicTransactionSemantics.
 void start()
           Starts a service or component.
 void stop()
           Stops a service or component.
 
Methods inherited from class org.apache.flume.channel.BasicChannelSemantics
getTransaction, initialize, put, take
 
Methods inherited from class org.apache.flume.channel.AbstractChannel
getLifecycleState, getName, setName
 
Methods inherited from class java.lang.Object
clone, equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait
 

Field Detail

WAL_DATA_DIR

public static final String WAL_DATA_DIR
See Also:
Constant Field Values

WAL_ROLL_SIZE

public static final String WAL_ROLL_SIZE
See Also:
Constant Field Values

WAL_MAX_LOGS_SIZE

public static final String WAL_MAX_LOGS_SIZE
See Also:
Constant Field Values

WAL_MIN_RENTENTION_PERIOD

public static final String WAL_MIN_RENTENTION_PERIOD
See Also:
Constant Field Values

WAL_WORKER_INTERVAL

public static final String WAL_WORKER_INTERVAL
See Also:
Constant Field Values
Constructor Detail

RecoverableMemoryChannel

public RecoverableMemoryChannel()
Method Detail

configure

public void configure(Context context)
Description copied from interface: Configurable

Request the implementing class to (re)configure itself.

When configuration parameters are changed, they must be reflected by the component asap.

There are no thread safety guarrantees on when configure might be called.

Specified by:
configure in interface Configurable
Overrides:
configure in class AbstractChannel

start

public void start()
Description copied from interface: LifecycleAware

Starts a service or component.

Implementations should determine the result of any start logic and effect the return value of LifecycleAware.getLifecycleState() accordingly.

Specified by:
start in interface LifecycleAware
Overrides:
start in class AbstractChannel

stop

public void stop()
Description copied from interface: LifecycleAware

Stops a service or component.

Implementations should determine the result of any stop logic and effect the return value of LifecycleAware.getLifecycleState() accordingly.

Specified by:
stop in interface LifecycleAware
Overrides:
stop in class AbstractChannel

createTransaction

protected BasicTransactionSemantics createTransaction()
Description copied from class: BasicChannelSemantics

Called to create new Transaction objects, which must extend BasicTransactionSemantics. Each object is used for only one transaction, but is stored in a thread-local and retrieved by getTransaction for the duration of that transaction.

Specified by:
createTransaction in class BasicChannelSemantics


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