Java Module jdk.jshell Package jdk.jshell.execution Class FailOverExecutionControlProvider（JDK11）

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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

Constructors
Constructor	Description
`FailOverExecutionControlProvider()`	Create an instance.

Method Summary

All Methods Instance Methods Concrete Methods
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 java.lang.Object
clone, equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait

- Constructor Detail
  - 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:
    
    generate(jdk.jshell.spi.ExecutionEnv, java.util.Map)
- Method Detail
  - 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.

Java Module jdk.jshell Package jdk.jshell.execution Class FailOverExecutionControlProvider（JDK11）

Class FailOverExecutionControlProvider

Constructor Summary

Method Summary

Methods declared in class java.lang.Object

Constructor Detail

FailOverExecutionControlProvider

Method Detail

name

defaultParameters

generate