Package org.yamcs.replication

Class ReplicationMaster

java.lang.Object

com.google.common.util.concurrent.AbstractService

org.yamcs.AbstractYamcsService

org.yamcs.replication.ReplicationMaster

All Implemented Interfaces:

com.google.common.util.concurrent.Service, YamcsService

public class ReplicationMaster
extends AbstractYamcsService

Implements the master part of the replication. At any moment there is one current file where the replication data is written.

Nested Class Summary

Nested Classes

Modifier and Type	Class	Description
static class	ReplicationMaster.SlaveServer

Nested classes/interfaces inherited from interface com.google.common.util.concurrent.Service

com.google.common.util.concurrent.Service.Listener, com.google.common.util.concurrent.Service.State

Field Summary

Fields inherited from class org.yamcs.AbstractYamcsService

config, log, serviceName, yamcsInstance

Constructor Summary

Constructors

Constructor	Description
ReplicationMaster()

Method Summary

Modifier and Type	Method	Description
protected void	doStart()
protected void	doStop()
ReplicationFile	getFile(long startTxId)	Get the file where startTxId transaction is or the earliest file available if the transaction is in the past
List<ReplicationMaster.SlaveServer>	getSlaveServers()
Spec	getSpec()	Returns the valid configuration options for this service.
List<String>	getStreamNames()
long	getTxId()	returns the id of the last transaction
void	init(String yamcsInstance, String serviceName, YConfiguration config)	Initialize this service.
boolean	isTcpClient()
io.netty.channel.ChannelHandler	newChannelHandler(Request req)

Methods inherited from class org.yamcs.AbstractYamcsService

findStream, getConfig, getYamcsInstance

Methods inherited from class com.google.common.util.concurrent.AbstractService

addListener, awaitRunning, awaitRunning, awaitRunning, awaitTerminated, awaitTerminated, awaitTerminated, doCancelStart, failureCause, isRunning, notifyFailed, notifyStarted, notifyStopped, startAsync, state, stopAsync, toString

Methods inherited from class java.lang.Object

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

Methods inherited from interface com.google.common.util.concurrent.Service

addListener, awaitRunning, awaitRunning, awaitRunning, awaitTerminated, awaitTerminated, awaitTerminated, failureCause, isRunning, startAsync, state, stopAsync

Constructor Details

ReplicationMaster

public ReplicationMaster()

Method Details

init

public void init(String yamcsInstance,
 String serviceName,
 YConfiguration config)
          throws InitException

Description copied from interface: YamcsService

Initialize this service. This is called before the service is started. All operations should finish fast.

Specified by:

init in interface YamcsService

Overrides:

init in class AbstractYamcsService

Parameters:

yamcsInstance - The yamcs instance, or null if this is a global service.

serviceName - The service name.

config - The configured arguments for this service. If YamcsService.getSpec() is implemented then this contains the arguments after being validated (including any defaults).

Throws:

InitException - When something goes wrong during the execution of this method.

getSpec

public Spec getSpec()

Description copied from interface: YamcsService

Returns the valid configuration options for this service.

Returns:

the argument specification, or null if the args should not be validated.

doStart

protected void doStart()

Specified by:

doStart in class com.google.common.util.concurrent.AbstractService

doStop

protected void doStop()

Specified by:

doStop in class com.google.common.util.concurrent.AbstractService

getTxId

public long getTxId()

returns the id of the last transaction

If there is no transaction, returns -1

newChannelHandler

public io.netty.channel.ChannelHandler newChannelHandler(Request req)

getStreamNames

public List<String> getStreamNames()

isTcpClient

public boolean isTcpClient()

getSlaveServers

public List<ReplicationMaster.SlaveServer> getSlaveServers()

getFile

public ReplicationFile getFile(long startTxId)

Get the file where startTxId transaction is or the earliest file available if the transaction is in the past

Return null if the transaction is in the future. If there is a file which does not contain the startTxId but it's just the next one to come, then return that file.

Parameters:

startTxId -

Returns: