com.caucho.server.distcache
Class DataStore

java.lang.Object
  com.caucho.server.distcache.DataStore

Direct Known Subclasses:

JdbcDataStore

public class DataStore
extends java.lang.Object

Manages the backing for the file database objects

Constructor Summary

DataStore(java.lang.String serverName, MnodeStore mnodeStore)

Method Summary

void	addOrphanListener(MnodeOrphanListener listener)
void	destroy()
long	getCount()
protected void	init()
boolean	isDataAvailable(HashKey id) Checks if we have the data
boolean	load(HashKey id, LoadDataCallback cb) Reads the object from the data store.
boolean	load(HashKey id, WriteStream os) Reads the object from the data store.
java.sql.Blob	loadBlob(HashKey id) Reads the object from the data store.
java.io.InputStream	openInputStream(HashKey id) Reads the object from the data store.
void	removeExpiredData() Clears the expired data
void	removeOrphanListener(MnodeOrphanListener listener)
boolean	save(HashKey id, java.io.InputStream is, int length) Saves the data, returning true on success.
boolean	save(HashKey id, StreamSource source, int length) Saves the data, returning true on success.
java.lang.String	toString()
boolean	updateExpires(HashKey id) Updates the expires time for the data.
void	validateDatabase() Clears the expired data

Methods inherited from class java.lang.Object

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

Constructor Detail

DataStore

public DataStore(java.lang.String serverName,
                 MnodeStore mnodeStore)
          throws java.lang.Exception

Throws:

java.lang.Exception

Method Detail

init

protected void init()
             throws java.lang.Exception

Throws:

java.lang.Exception

addOrphanListener

public void addOrphanListener(MnodeOrphanListener listener)

removeOrphanListener

public void removeOrphanListener(MnodeOrphanListener listener)

load

public boolean load(HashKey id,
                    WriteStream os)

Reads the object from the data store.

Parameters:

id - the hash identifier for the data

os - the WriteStream to hold the data

Returns:

true on successful load

loadBlob

public java.sql.Blob loadBlob(HashKey id)

Reads the object from the data store.

Parameters:

id - the hash identifier for the data

os - the WriteStream to hold the data

Returns:

true on successful load

load

public boolean load(HashKey id,
                    LoadDataCallback cb)

Reads the object from the data store.

Parameters:

id - the hash identifier for the data

os - the WriteStream to hold the data

Returns:

true on successful load

isDataAvailable

public boolean isDataAvailable(HashKey id)

Checks if we have the data

Parameters:

id - the hash identifier for the data

Returns:

true on successful load

openInputStream

public java.io.InputStream openInputStream(HashKey id)

Reads the object from the data store.

Parameters:

id - the hash identifier for the data

os - the WriteStream to hold the data

Returns:

true on successful load

save

public boolean save(HashKey id,
                    StreamSource source,
                    int length)
             throws java.io.IOException

Saves the data, returning true on success.

Parameters:

id - the object's unique id.

is - the input stream to the serialized object

length - the length object the serialized object

Throws:

java.io.IOException

save

public boolean save(HashKey id,
                    java.io.InputStream is,
                    int length)
             throws java.io.IOException

Saves the data, returning true on success.

Parameters:

id - the object's unique id.

is - the input stream to the serialized object

length - the length object the serialized object

Throws:

java.io.IOException

updateExpires

public boolean updateExpires(HashKey id)

Updates the expires time for the data.

Parameters:

id - the hash identifier for the data

Returns:

true if the database contains the id

removeExpiredData

public void removeExpiredData()

Clears the expired data

validateDatabase

public void validateDatabase()

Clears the expired data

getCount

public long getCount()

destroy

public void destroy()

toString

public java.lang.String toString()

Overrides:

toString in class java.lang.Object