Package org.apache.hadoop.hdfs

Class ClientGSIContext

java.lang.Object

org.apache.hadoop.hdfs.ClientGSIContext

All Implemented Interfaces:

org.apache.hadoop.ipc.AlignmentContext

@Private
@Evolving
public class ClientGSIContext
extends java.lang.Object
implements org.apache.hadoop.ipc.AlignmentContext

Global State Id context for the client.

This is the client side implementation responsible for receiving state alignment info from server(s).

Constructor Summary

Constructors

Constructor	Description
ClientGSIContext()
ClientGSIContext(java.util.concurrent.atomic.LongAccumulator lastSeenStateId)

Method Summary

Modifier and Type	Method	Description
long	getLastSeenStateId()
org.apache.hadoop.thirdparty.protobuf.ByteString	getRouterFederatedState()
static java.util.Map<java.lang.String,java.lang.Long>	getRouterFederatedStateMap(org.apache.hadoop.thirdparty.protobuf.ByteString byteString)	Utility function to parse routerFederatedState field in RPC headers.
boolean	isCoordinatedCall(java.lang.String protocolName, java.lang.String method)
static org.apache.hadoop.thirdparty.protobuf.ByteString	mergeRouterFederatedState(org.apache.hadoop.thirdparty.protobuf.ByteString state1, org.apache.hadoop.thirdparty.protobuf.ByteString state2)	Merge state1 and state2 to get the max value for each namespace.
long	receiveRequestState(org.apache.hadoop.ipc.protobuf.RpcHeaderProtos.RpcRequestHeaderProto header, long threshold)	Client side implementation only provides state alignment info in requests.
void	receiveResponseState(org.apache.hadoop.ipc.protobuf.RpcHeaderProtos.RpcResponseHeaderProto header)	Client side implementation for receiving state alignment info in responses.
void	updateRequestState(org.apache.hadoop.ipc.protobuf.RpcHeaderProtos.RpcRequestHeaderProto.Builder header)	Client side implementation for providing state alignment info in requests.
void	updateResponseState(org.apache.hadoop.ipc.protobuf.RpcHeaderProtos.RpcResponseHeaderProto.Builder header)	Client side implementation only receives state alignment info.

Methods inherited from class java.lang.Object

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

Constructor Detail

ClientGSIContext

public ClientGSIContext()

ClientGSIContext

public ClientGSIContext(java.util.concurrent.atomic.LongAccumulator lastSeenStateId)

Method Detail

getLastSeenStateId

public long getLastSeenStateId()

Specified by:

getLastSeenStateId in interface org.apache.hadoop.ipc.AlignmentContext

isCoordinatedCall

public boolean isCoordinatedCall(java.lang.String protocolName,
                                 java.lang.String method)

Specified by:

isCoordinatedCall in interface org.apache.hadoop.ipc.AlignmentContext

updateResponseState

public void updateResponseState(org.apache.hadoop.ipc.protobuf.RpcHeaderProtos.RpcResponseHeaderProto.Builder header)

Client side implementation only receives state alignment info. It does not provide state alignment info therefore this does nothing.

Specified by:

updateResponseState in interface org.apache.hadoop.ipc.AlignmentContext

receiveResponseState

public void receiveResponseState(org.apache.hadoop.ipc.protobuf.RpcHeaderProtos.RpcResponseHeaderProto header)

Client side implementation for receiving state alignment info in responses.

Specified by:

receiveResponseState in interface org.apache.hadoop.ipc.AlignmentContext

getRouterFederatedStateMap

public static java.util.Map<java.lang.String,java.lang.Long> getRouterFederatedStateMap(org.apache.hadoop.thirdparty.protobuf.ByteString byteString)

Utility function to parse routerFederatedState field in RPC headers.

mergeRouterFederatedState

public static org.apache.hadoop.thirdparty.protobuf.ByteString mergeRouterFederatedState(org.apache.hadoop.thirdparty.protobuf.ByteString state1,
                                                                                         org.apache.hadoop.thirdparty.protobuf.ByteString state2)

Merge state1 and state2 to get the max value for each namespace.

Parameters:

state1 - input ByteString.

state2 - input ByteString.

Returns:

one ByteString object which contains the max value of each namespace.

updateRequestState

public void updateRequestState(org.apache.hadoop.ipc.protobuf.RpcHeaderProtos.RpcRequestHeaderProto.Builder header)

Client side implementation for providing state alignment info in requests.

Specified by:

updateRequestState in interface org.apache.hadoop.ipc.AlignmentContext

receiveRequestState

public long receiveRequestState(org.apache.hadoop.ipc.protobuf.RpcHeaderProtos.RpcRequestHeaderProto header,
                                long threshold)
                         throws java.io.IOException

Client side implementation only provides state alignment info in requests. Client does not receive RPC requests therefore this does nothing.

Specified by:

receiveRequestState in interface org.apache.hadoop.ipc.AlignmentContext

Throws:

java.io.IOException

getRouterFederatedState

@VisibleForTesting
public org.apache.hadoop.thirdparty.protobuf.ByteString getRouterFederatedState()