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java.lang.Objectorg.apache.zookeeper.server.persistence.FileSnap
public class FileSnap
This class implements the snapshot interface. it is responsible for storing, serializing and deserializing the right snapshot. and provides access to the snapshots.
Field Summary | |
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static int |
SNAP_MAGIC
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Constructor Summary | |
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FileSnap(java.io.File snapDir)
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Method Summary | |
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void |
close()
synchronized close just so that if serialize is in place the close operation will block and will wait till serialize is done and will set the close flag |
long |
deserialize(DataTree dt,
java.util.Map<java.lang.Long,java.lang.Integer> sessions)
deserialize a data tree from the most recent snapshot |
void |
deserialize(DataTree dt,
java.util.Map<java.lang.Long,java.lang.Integer> sessions,
org.apache.jute.InputArchive ia)
deserialize the datatree from an inputarchive |
java.io.File |
findMostRecentSnapshot()
find the most recent snapshot in the database. |
java.util.List<java.io.File> |
findNRecentSnapshots(int n)
find the last n snapshots. |
void |
serialize(DataTree dt,
java.util.Map<java.lang.Long,java.lang.Integer> sessions,
java.io.File snapShot)
serialize the datatree and session into the file snapshot |
protected void |
serialize(DataTree dt,
java.util.Map<java.lang.Long,java.lang.Integer> sessions,
org.apache.jute.OutputArchive oa,
FileHeader header)
serialize the datatree and sessions |
Methods inherited from class java.lang.Object |
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clone, equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait |
Field Detail |
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public static final int SNAP_MAGIC
Constructor Detail |
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public FileSnap(java.io.File snapDir)
Method Detail |
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public long deserialize(DataTree dt, java.util.Map<java.lang.Long,java.lang.Integer> sessions) throws java.io.IOException
deserialize
in interface SnapShot
dt
- the datatree to be deserialized intosessions
- the sessions to be deserialized into
java.io.IOException
public void deserialize(DataTree dt, java.util.Map<java.lang.Long,java.lang.Integer> sessions, org.apache.jute.InputArchive ia) throws java.io.IOException
dt
- the datatree to be serialized intosessions
- the sessions to be filled upia
- the input archive to restore from
java.io.IOException
public java.io.File findMostRecentSnapshot() throws java.io.IOException
findMostRecentSnapshot
in interface SnapShot
java.io.IOException
public java.util.List<java.io.File> findNRecentSnapshots(int n) throws java.io.IOException
the
- number of most recent snapshots
java.io.IOException
protected void serialize(DataTree dt, java.util.Map<java.lang.Long,java.lang.Integer> sessions, org.apache.jute.OutputArchive oa, FileHeader header) throws java.io.IOException
dt
- the datatree to be serializedsessions
- the sessions to be serializedoa
- the output archive to serialize intoheader
- the header of this snapshot
java.io.IOException
public void serialize(DataTree dt, java.util.Map<java.lang.Long,java.lang.Integer> sessions, java.io.File snapShot) throws java.io.IOException
serialize
in interface SnapShot
dt
- the datatree to be serializedsessions
- the sessions to be serializedsnapShot
- the file to store snapshot into
java.io.IOException
public void close() throws java.io.IOException
close
in interface SnapShot
java.io.IOException
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