Class FailOverExecutionControlProvider

java.lang.Object

jdk.jshell.execution.FailOverExecutionControlProvider

All Implemented Interfaces:: ExecutionControlProvider

public class FailOverExecutionControlProvider extends Object implements ExecutionControlProvider

Tries other providers in sequence until one works.

Since:: 9

Constructor Summary

Constructor	Description
`FailOverExecutionControlProvider()`	Create an instance.

Method Summary

Modifier and Type	Method	Description
`Map<String,String>`	`defaultParameters()`	Create and return the default parameter map for this `ExecutionControlProvider`.
`ExecutionControl`	`generate(ExecutionEnv env, Map<String,String> parameters)`	Create and return a locally executing `ExecutionControl` instance.
`String`	`name()`	The unique name of this `ExecutionControlProvider`.

Methods declared in class Object

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

Modifier and Type	Method	Description
`protected Object`	`clone()`	Creates and returns a copy of this object.
`boolean`	`equals(Object obj)`	Indicates whether some other object is "equal to" this one.
`protected void`	`finalize()`	Deprecated, for removal: This API element is subject to removal in a future version. Finalization is deprecated and subject to removal in a future release.
`final Class<?>`	`getClass()`	Returns the runtime class of this `Object`.
`int`	`hashCode()`	Returns a hash code value for this object.
`final void`	`notify()`	Wakes up a single thread that is waiting on this object's monitor.
`final void`	`notifyAll()`	Wakes up all threads that are waiting on this object's monitor.
`String`	`toString()`	Returns a string representation of the object.
`final void`	`wait()`	Causes the current thread to wait until it is awakened, typically by being notified or interrupted.
`final void`	`wait(long timeoutMillis)`	Causes the current thread to wait until it is awakened, typically by being notified or interrupted, or until a certain amount of real time has elapsed.
`final void`	`wait(long timeoutMillis, int nanos)`	Causes the current thread to wait until it is awakened, typically by being notified or interrupted, or until a certain amount of real time has elapsed.

Constructor Details

FailOverExecutionControlProvider

public FailOverExecutionControlProvider()

Create an instance. The instance can be used to start and return an ExecutionControl instance by attempting to start a series of ExecutionControl specs, until one is successful.

See Also:

Method Details

name

public String name()

The unique name of this ExecutionControlProvider.

Specified by:: name in interface ExecutionControlProvider
Returns:: "failover"

defaultParameters

public Map<String,String> defaultParameters()

Create and return the default parameter map for this ExecutionControlProvider. There are ten parameters, "0" through "9", their values are ExecutionControlProvider specification strings, or empty string.

Specified by:: defaultParameters in interface ExecutionControlProvider
Returns:: a default parameter map

generate

public ExecutionControl generate(ExecutionEnv env, Map<String,String> parameters) throws Throwable

Create and return a locally executing ExecutionControl instance. At least one parameter should have a spec.

Specified by:: generate in interface ExecutionControlProvider
Parameters:: env - the execution environment, provided by JShell; parameters - the modified parameter map.
Returns:: the execution engine
Throws:: Throwable - if all the given providers fail, the exception that occurred on the first attempt to create the execution engine.

© 1993, 2025, Oracle and/or its affiliates. All rights reserved.
Documentation extracted from Debian's OpenJDK Development Kit package.
Licensed under the GNU General Public License, version 2, with the Classpath Exception.
Various third party code in OpenJDK is licensed under different licenses (see Debian package).
Java and OpenJDK are trademarks or registered trademarks of Oracle and/or its affiliates.