org.aksw.jena_sparql_api.io.utils

Class AbstractSystemService

java.lang.Object

com.google.common.util.concurrent.AbstractIdleService

org.aksw.jena_sparql_api.io.utils.AbstractSystemService

All Implemented Interfaces:

com.google.common.util.concurrent.Service

public abstract class AbstractSystemService
extends com.google.common.util.concurrent.AbstractIdleService

Nested Class Summary

Nested classes/interfaces inherited from interface com.google.common.util.concurrent.Service

com.google.common.util.concurrent.Service.Listener, com.google.common.util.concurrent.Service.State

Field Summary

Fields

Modifier and Type	Field and Description
protected Duration	healthCheckInterval
protected Consumer<String>	outputSink
protected Process	process
protected Thread	shutdownHookThread

Constructor Summary

Constructors

Constructor and Description
AbstractSystemService()

Method Summary

Modifier and Type	Method and Description
Duration	getHealthCheckInterval()
Consumer<String>	getOutputSink()
abstract boolean	performHealthCheck() Perform a health check on the service.
protected abstract ProcessBuilder	prepareProcessBuilder() Expected to return a properly configured ProcessBuilder instance, such as having the path to the executable and the arguments set.
AbstractSystemService	setHealthCheckInterval(Duration healthCheckInterval)
AbstractSystemService	setOutputSink(Consumer<String> outputSink)
protected void	shutDown()
protected void	startUp() Starts the service and yields a future indicating whether it became healthy within a certain time limit.

Methods inherited from class com.google.common.util.concurrent.AbstractIdleService

addListener, awaitRunning, awaitRunning, awaitTerminated, awaitTerminated, executor, failureCause, isRunning, serviceName, startAsync, state, stopAsync, toString

Methods inherited from class java.lang.Object

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

Field Detail

healthCheckInterval

protected Duration healthCheckInterval

process

protected transient Process process

outputSink

protected Consumer<String> outputSink

shutdownHookThread

protected Thread shutdownHookThread

Constructor Detail

AbstractSystemService

public AbstractSystemService()

Method Detail

getOutputSink

public Consumer<String> getOutputSink()

setOutputSink

public AbstractSystemService setOutputSink(Consumer<String> outputSink)

getHealthCheckInterval

public Duration getHealthCheckInterval()

setHealthCheckInterval

public AbstractSystemService setHealthCheckInterval(Duration healthCheckInterval)

performHealthCheck

public abstract boolean performHealthCheck()

Perform a health check on the service. During a startup, a service enters running state in the moment the health check succeeds.

Returns:

prepareProcessBuilder

protected abstract ProcessBuilder prepareProcessBuilder()

Expected to return a properly configured ProcessBuilder instance, such as having the path to the executable and the arguments set.

Returns:

startUp

protected void startUp()
                throws IOException,
                       InterruptedException

Starts the service and yields a future indicating whether it became healthy within a certain time limit. The service may still become healthy at a later stage, however,

Specified by:

startUp in class com.google.common.util.concurrent.AbstractIdleService

Throws:

IOException

InterruptedException

shutDown

protected void shutDown()

Specified by:

shutDown in class com.google.common.util.concurrent.AbstractIdleService