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java.lang.Objectorg.apache.hadoop.hbase.HMsg
public class HMsg
HMsg is for communicating instructions between the HMaster and the HRegionServers.
Field Summary | |
---|---|
static byte |
MSG_CALL_SERVER_STARTUP
Region server is unknown to master. |
static byte |
MSG_REGION_CLOSE
Stop serving the specified region |
static byte |
MSG_REGION_CLOSE_WITHOUT_REPORT
Stop serving the specified region and don't report back that it's closed |
static byte |
MSG_REGION_OPEN
Start serving the specified region |
static byte |
MSG_REGIONSERVER_QUIESCE
Stop serving user regions |
static byte |
MSG_REGIONSERVER_STOP
Master tells region server to stop |
static byte |
MSG_REPORT_CLOSE
region server is no longer serving the specified region |
static byte |
MSG_REPORT_EXITING
region server is shutting down note that this message is followed by MSG_REPORT_CLOSE messages for each region the region server was serving, unless it was told to quiesce. |
static byte |
MSG_REPORT_OPEN
region server is now serving the specified region |
static byte |
MSG_REPORT_PROCESS_OPEN
region server is processing open request |
static byte |
MSG_REPORT_QUIESCED
region server has closed all user regions but is still serving meta regions |
static byte |
MSG_REPORT_SPLIT
region server split the region associated with this message. |
Constructor Summary | |
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HMsg()
Default constructor. |
|
HMsg(byte msg)
Construct a message with an empty HRegionInfo |
|
HMsg(byte msg,
HRegionInfo info)
Construct a message with the specified message code and HRegionInfo |
Method Summary | |
---|---|
byte |
getMsg()
Accessor |
HRegionInfo |
getRegionInfo()
Accessor |
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 . |
Methods inherited from class java.lang.Object |
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clone, equals, finalize, getClass, hashCode, notify, notifyAll, wait, wait, wait |
Field Detail |
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public static final byte MSG_REGION_OPEN
public static final byte MSG_REGION_CLOSE
public static final byte MSG_CALL_SERVER_STARTUP
public static final byte MSG_REGIONSERVER_STOP
public static final byte MSG_REGION_CLOSE_WITHOUT_REPORT
public static final byte MSG_REGIONSERVER_QUIESCE
public static final byte MSG_REPORT_OPEN
public static final byte MSG_REPORT_CLOSE
public static final byte MSG_REPORT_PROCESS_OPEN
public static final byte MSG_REPORT_SPLIT
public static final byte MSG_REPORT_EXITING
public static final byte MSG_REPORT_QUIESCED
Constructor Detail |
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public HMsg()
public HMsg(byte msg)
msg
- - message codepublic HMsg(byte msg, HRegionInfo info)
msg
- - message codeinfo
- - HRegionInfoMethod Detail |
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public byte getMsg()
public HRegionInfo getRegionInfo()
public String toString()
toString
in class Object
public void write(DataOutput out) throws IOException
out
.
write
in interface Writable
out
- DataOuput
to serialize this object into.
IOException
public void readFields(DataInput in) throws IOException
in
.
For efficiency, implementations should attempt to re-use storage in the existing object where possible.
readFields
in interface Writable
in
- DataInput
to deseriablize this object from.
IOException
|
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