org.apache.hadoop.hdfs.server.namenode

类 CheckpointSignature

java.lang.Object

org.apache.hadoop.hdfs.server.common.StorageInfo

org.apache.hadoop.hdfs.server.namenode.CheckpointSignature

所有已实现的接口:

Comparable<CheckpointSignature>, Writable, WritableComparable<CheckpointSignature>

public class CheckpointSignature
extends StorageInfo
implements WritableComparable<CheckpointSignature>

A unique signature intended to identify checkpoint transactions.

字段概要

从类继承的字段 org.apache.hadoop.hdfs.server.common.StorageInfo

cTime, layoutVersion, namespaceID

方法概要

方法

限定符和类型	方法和说明
int	compareTo(CheckpointSignature o)
boolean	equals(Object o)
int	hashCode()
void	readFields(DataInput in) Deserialize the fields of this object from in.
String	toString()
void	write(DataOutput out) Serialize the fields of this object to out.

从类继承的方法 org.apache.hadoop.hdfs.server.common.StorageInfo

getCTime, getLayoutVersion, getNamespaceID, setStorageInfo

从类继承的方法 java.lang.Object

clone, finalize, getClass, notify, notifyAll, wait, wait, wait

方法详细资料

toString

public String toString()

覆盖:

toString 在类中 Object

compareTo

public int compareTo(CheckpointSignature o)

指定者:

compareTo 在接口中 Comparable<CheckpointSignature>

equals

public boolean equals(Object o)

覆盖:

equals 在类中 Object

hashCode

public int hashCode()

覆盖:

hashCode 在类中 Object

write

public void write(DataOutput out)
           throws IOException

从接口复制的说明: Writable

Serialize the fields of this object to out.

指定者:

write 在接口中 Writable

参数:

out - DataOuput to serialize this object into.

抛出:

IOException

readFields

public void readFields(DataInput in)
                throws IOException

从接口复制的说明: Writable

Deserialize the fields of this object from in.

For efficiency, implementations should attempt to re-use storage in the existing object where possible.

指定者:

readFields 在接口中 Writable

参数:

in - DataInput to deseriablize this object from.

抛出:

IOException