org.apache.storm.daemon.supervisor

Class ContainerLauncher

java.lang.Object

org.apache.storm.daemon.supervisor.ContainerLauncher

Direct Known Subclasses:

BasicContainerLauncher, LocalContainerLauncher, RunAsUserContainerLauncher

public abstract class ContainerLauncher
extends Object

Launches containers

Constructor Summary

Constructors

Modifier	Constructor and Description
protected	ContainerLauncher()

Method Summary

Modifier and Type	Method and Description
abstract Container	launchContainer(int port, LocalAssignment assignment, LocalState state) Launch a container in a given slot
static ContainerLauncher	make(Map<String,Object> conf, String supervisorId, IContext sharedContext) Factory to create the right container launcher for the config and the environment.
abstract Container	recoverContainer(int port, LocalAssignment assignment, LocalState state) Recover a container for a running process
abstract Killable	recoverContainer(String workerId, LocalState localState) Try to recover a container using just the worker ID. The result is really only useful for killing the container and so is returning a Killable.

Methods inherited from class java.lang.Object

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

Constructor Detail

ContainerLauncher

protected ContainerLauncher()

Method Detail

make

public static ContainerLauncher make(Map<String,Object> conf,
                                     String supervisorId,
                                     IContext sharedContext)
                              throws IOException

Factory to create the right container launcher for the config and the environment.

Parameters:

conf - the config

supervisorId - the ID of the supervisor

sharedContext - Used in local mode to let workers talk together without netty

Returns:

the proper container launcher

Throws:

IOException - on any error

launchContainer

public abstract Container launchContainer(int port,
                                          LocalAssignment assignment,
                                          LocalState state)
                                   throws IOException

Launch a container in a given slot

Parameters:

port - the port to run this on

assignment - what to launch

state - the current state of the supervisor

Returns:

The container that can be used to manager the processes.

Throws:

IOException - on any error

recoverContainer

public abstract Container recoverContainer(int port,
                                           LocalAssignment assignment,
                                           LocalState state)
                                    throws IOException,
                                           ContainerRecoveryException

Recover a container for a running process

Parameters:

port - the port the assignment is running on

assignment - the assignment that was launched

state - the current state of the supervisor

Returns:

The container that can be used to manage the processes.

Throws:

IOException - on any error

ContainerRecoveryException - if the Container could not be recovered

recoverContainer

public abstract Killable recoverContainer(String workerId,
                                          LocalState localState)
                                   throws IOException,
                                          ContainerRecoveryException

Try to recover a container using just the worker ID.
The result is really only useful for killing the container and so is returning a Killable. Even if a Container is returned do not case the result to Container because only the Killable APIs are guaranteed to work.

Parameters:

workerId - the id of the worker to use

localState - the state of the running supervisor

Returns:

a Killable that can be used to kill the underlying container.

Throws:

IOException - on any error

ContainerRecoveryException - if the Container could not be recovered