org.apache.flink.runtime.taskmanager

Class TaskManager

java.lang.Object

org.apache.flink.runtime.taskmanager.TaskManager

All Implemented Interfaces:

VersionedProtocol, TaskOperationProtocol

public class TaskManager
extends Object
implements TaskOperationProtocol

A task manager receives tasks from the job manager and executes them. After having executed them (or in case of an execution error) it reports the execution result back to the job manager. Task managers are able to automatically discover the job manager and receive its configuration from it as long as the job manager is running on the same local network

Field Summary

Fields

Modifier and Type	Field and Description
static String	ARG_CONF_DIR

Constructor Summary

Constructors

Constructor and Description
TaskManager(ExecutionMode executionMode, JobManagerProtocol jobManager, InputSplitProviderProtocol splitProvider, ChannelLookupProtocol channelLookup, AccumulatorProtocol accumulators, InetSocketAddress jobManagerAddress, InetAddress taskManagerBindAddress)

Method Summary

Modifier and Type	Method and Description
void	cancelAndClearEverything(Throwable cause) Removes all tasks from this TaskManager.
TaskOperationResult	cancelTask(ExecutionAttemptID executionId)
static TaskManager	createTaskManager(ExecutionMode mode)
static TaskManager	createTaskManager(ExecutionMode mode, InetSocketAddress jobManagerAddress)
static TaskManager	createTaskManager(ExecutionMode mode, InetSocketAddress jobManagerAddress, InetAddress taskManagerAddress)
Map<ExecutionAttemptID,Task>	getAllRunningTasks()
BroadcastVariableManager	getBroadcastVariableManager()
ChannelManager	getChannelManager()
InstanceConnectionInfo	getConnectionInfo()
ExecutionMode	getExecutionMode()
InstanceID	getRegisteredId() Gets the ID under which the TaskManager is currently registered at its JobManager.
boolean	isRegistered() Checks if the TaskManager is properly registered and ready to receive work.
boolean	isShutDown() Checks whether the task manager has already been shut down.
void	killTaskManager()
static void	main(String[] args) Entry point for the TaskManager executable.
void	notifyExecutionStateChange(JobID jobID, ExecutionAttemptID executionId, ExecutionState newExecutionState, Throwable optionalError)
void	shutdown() Shuts the task manager down.
TaskOperationResult	submitTask(TaskDeploymentDescriptor tdd)

Methods inherited from class java.lang.Object

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

Field Detail

ARG_CONF_DIR

public static final String ARG_CONF_DIR

See Also:

Constant Field Values

Constructor Detail

TaskManager

public TaskManager(ExecutionMode executionMode,
                   JobManagerProtocol jobManager,
                   InputSplitProviderProtocol splitProvider,
                   ChannelLookupProtocol channelLookup,
                   AccumulatorProtocol accumulators,
                   InetSocketAddress jobManagerAddress,
                   InetAddress taskManagerBindAddress)
            throws Exception

Throws:

Exception

Method Detail

shutdown

public void shutdown()

Shuts the task manager down.

isShutDown

public boolean isShutDown()

Checks whether the task manager has already been shut down.

Returns:

true if the task manager has already been shut down, false otherwise

getConnectionInfo

public InstanceConnectionInfo getConnectionInfo()

getExecutionMode

public ExecutionMode getExecutionMode()

getRegisteredId

public InstanceID getRegisteredId()

Gets the ID under which the TaskManager is currently registered at its JobManager. If the TaskManager has not been registered, yet, or if it lost contact, this is is null.

Returns:

The ID under which the TaskManager is currently registered.

isRegistered

public boolean isRegistered()

Checks if the TaskManager is properly registered and ready to receive work.

Returns:

True, if the TaskManager is registered, false otherwise.

getAllRunningTasks

public Map<ExecutionAttemptID,Task> getAllRunningTasks()

getChannelManager

public ChannelManager getChannelManager()

getBroadcastVariableManager

public BroadcastVariableManager getBroadcastVariableManager()

cancelTask

public TaskOperationResult cancelTask(ExecutionAttemptID executionId)
                               throws IOException

Specified by:

cancelTask in interface TaskOperationProtocol

Throws:

IOException

submitTask

public TaskOperationResult submitTask(TaskDeploymentDescriptor tdd)

Specified by:

submitTask in interface TaskOperationProtocol

notifyExecutionStateChange

public void notifyExecutionStateChange(JobID jobID,
                                       ExecutionAttemptID executionId,
                                       ExecutionState newExecutionState,
                                       Throwable optionalError)

cancelAndClearEverything

public void cancelAndClearEverything(Throwable cause)

Removes all tasks from this TaskManager.

createTaskManager

public static TaskManager createTaskManager(ExecutionMode mode)
                                     throws Exception

Throws:

Exception

createTaskManager

public static TaskManager createTaskManager(ExecutionMode mode,
                                            InetSocketAddress jobManagerAddress)
                                     throws Exception

Throws:

Exception

createTaskManager

public static TaskManager createTaskManager(ExecutionMode mode,
                                            InetSocketAddress jobManagerAddress,
                                            InetAddress taskManagerAddress)
                                     throws Exception

Throws:

Exception

main

public static void main(String[] args)
                 throws IOException

Entry point for the TaskManager executable.

Parameters:

args - Arguments from the command line

Throws:

IOException

killTaskManager

public void killTaskManager()
                     throws IOException

Specified by:

killTaskManager in interface TaskOperationProtocol

Throws:

IOException