- java.lang.Object
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- jdk.jshell.execution.FailOverExecutionControlProvider
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- All Implemented Interfaces:
ExecutionControlProvider
public class FailOverExecutionControlProvider extends Object implements ExecutionControlProvider
Tries other providers in sequence until one works.- Since:
- 9
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Constructor Summary
Constructors Constructor Description FailOverExecutionControlProvider()Create an instance.
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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 thisExecutionControlProvider.ExecutionControlgenerate(ExecutionEnv env, Map<String,String> parameters)Create and return a locally executingExecutionControlinstance.Stringname()The unique name of thisExecutionControlProvider.
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Constructor Detail
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FailOverExecutionControlProvider
public FailOverExecutionControlProvider()
Create an instance. The instance can be used to start and return anExecutionControlinstance by attempting to start a series ofExecutionControlspecs, until one is successful.
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Method Detail
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name
public String name()
The unique name of thisExecutionControlProvider.- Specified by:
namein interfaceExecutionControlProvider- Returns:
- "failover"
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defaultParameters
public Map<String,String> defaultParameters()
Create and return the default parameter map for thisExecutionControlProvider. There are ten parameters, "0" through "9", their values areExecutionControlProviderspecification strings, or empty string.- Specified by:
defaultParametersin interfaceExecutionControlProvider- Returns:
- a default parameter map
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generate
public ExecutionControl generate(ExecutionEnv env, Map<String,String> parameters) throws Throwable
Create and return a locally executingExecutionControlinstance. At least one parameter should have a spec.- Specified by:
generatein interfaceExecutionControlProvider- Parameters:
env- the execution environment, provided by JShellparameters- 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.
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