Package org.apache.camel.impl.engine

Class FileStateRepository

java.lang.Object

org.apache.camel.support.service.BaseService

org.apache.camel.support.service.ServiceSupport

org.apache.camel.impl.engine.FileStateRepository

All Implemented Interfaces:

AutoCloseable, org.apache.camel.Service, org.apache.camel.ShutdownableService, org.apache.camel.spi.StateRepository<String,String>, org.apache.camel.StatefulService, org.apache.camel.SuspendableService

@ManagedResource(description="File based state repository")
public class FileStateRepository
extends org.apache.camel.support.service.ServiceSupport
implements org.apache.camel.spi.StateRepository<String,String>

This FileStateRepository class is a file-based implementation of a StateRepository.

Field Summary

Fields inherited from class org.apache.camel.support.service.BaseService

BUILDED, FAILED, INITIALIZED, INITIALIZING, lock, NEW, SHUTDOWN, SHUTTINGDOWN, STARTED, STARTING, status, STOPPED, STOPPING, SUSPENDED, SUSPENDING

Constructor Summary

Constructors

Constructor	Description
FileStateRepository()
FileStateRepository(File fileStore, Map<String,String> cache)

Method Summary

Modifier and Type	Method	Description
protected void	doStart()
protected void	doStop()
static FileStateRepository	fileStateRepository(File fileStore)	Creates a new file based repository using as 1st level cache
static FileStateRepository	fileStateRepository(File fileStore, long maxFileStoreSize)	Creates a new file based repository using a HashMap as 1st level cache.
static FileStateRepository	fileStateRepository(File store, Map<String,String> cache)	Creates a new file based repository using the given Map as 1st level cache.
Map<String,String>	getCache()
String	getFilePath()
File	getFileStore()
long	getMaxFileStoreSize()
String	getState(String key)
protected void	loadStore()	Loads the given file store into the 1st level cache
void	reset()	Resets and clears the store to force it to reload from file
void	setCache(Map<String,String> cache)
void	setFileStore(File fileStore)
void	setMaxFileStoreSize(long maxFileStoreSize)	Sets the maximum file size for the file store in bytes.
void	setState(String key, String value)
protected void	trunkStore()	Trunks the file store when the max store size is hit by rewriting the 1st level cache to the file store.

Methods inherited from class org.apache.camel.support.service.BaseService

build, doBuild, doFail, doInit, doLifecycleChange, doResume, doShutdown, doSuspend, fail, getStatus, init, isBuild, isInit, isNew, isRunAllowed, isShutdown, isStarted, isStarting, isStartingOrStarted, isStopped, isStopping, isStoppingOrStopped, isSuspended, isSuspending, isSuspendingOrSuspended, resume, shutdown, start, stop, suspend

Methods inherited from class java.lang.Object

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

Methods inherited from interface org.apache.camel.Service

build, close, init, start, stop

Methods inherited from interface org.apache.camel.ShutdownableService

shutdown

Methods inherited from interface org.apache.camel.StatefulService

getStatus, isRunAllowed, isStarted, isStarting, isStopped, isStopping, isSuspending

Methods inherited from interface org.apache.camel.SuspendableService

isSuspended, resume, suspend

Constructor Detail

FileStateRepository

public FileStateRepository()

FileStateRepository

public FileStateRepository(File fileStore,
                           Map<String,String> cache)

Method Detail

fileStateRepository

public static FileStateRepository fileStateRepository(File fileStore)

Creates a new file based repository using as 1st level cache

Parameters:

fileStore - the file store

fileStateRepository

public static FileStateRepository fileStateRepository(File fileStore,
                                                      long maxFileStoreSize)

Creates a new file based repository using a HashMap as 1st level cache.

Parameters:

fileStore - the file store

maxFileStoreSize - the max size in bytes for the fileStore file

fileStateRepository

public static FileStateRepository fileStateRepository(File store,
                                                      Map<String,String> cache)

Creates a new file based repository using the given Map as 1st level cache.

Care should be taken to use a suitable underlying Map to avoid this class being a memory leak.

Parameters:

store - the file store

cache - the cache to use as 1st level cache

setState

@ManagedOperation(description="Adds the value of the given key to the store")
public void setState(String key,
                     String value)

Specified by:

setState in interface org.apache.camel.spi.StateRepository<String,String>

getState

@ManagedOperation(description="Gets the value of the given key from store")
public String getState(String key)

Specified by:

getState in interface org.apache.camel.spi.StateRepository<String,String>

reset

@ManagedOperation(description="Reset and reloads the file store")
public void reset()
           throws IOException

Resets and clears the store to force it to reload from file

Throws:

IOException

trunkStore

protected void trunkStore()

Trunks the file store when the max store size is hit by rewriting the 1st level cache to the file store.

loadStore

protected void loadStore()
                  throws IOException

Loads the given file store into the 1st level cache

Throws:

IOException

doStart

protected void doStart()
                throws Exception

Overrides:

doStart in class org.apache.camel.support.service.BaseService

Throws:

Exception

doStop

protected void doStop()
               throws Exception

Overrides:

doStop in class org.apache.camel.support.service.BaseService

Throws:

Exception

getFileStore

public File getFileStore()

setFileStore

public void setFileStore(File fileStore)

getFilePath

@ManagedAttribute(description="The file path for the store")
public String getFilePath()

getCache

public Map<String,String> getCache()

setCache

public void setCache(Map<String,String> cache)

getMaxFileStoreSize

@ManagedAttribute(description="The maximum file size for the file store in bytes")
public long getMaxFileStoreSize()

setMaxFileStoreSize

@ManagedAttribute(description="The maximum file size for the file store in bytes")
public void setMaxFileStoreSize(long maxFileStoreSize)

Sets the maximum file size for the file store in bytes.

The default is 1mb.