Package hudson.remoting

Class JarCacheSupport

java.lang.Object

hudson.remoting.JarCache

hudson.remoting.JarCacheSupport

Direct Known Subclasses:

FileSystemJarCache

public abstract class JarCacheSupport
extends JarCache

Default partial implementation of JarCache.

Since:

2.24

Author:

Kohsuke Kawaguchi

Field Summary

Fields inherited from class hudson.remoting.JarCache

DEFAULT_NOWS_JAR_CACHE_LOCATION

Constructor Summary

Constructors

Constructor	Description
JarCacheSupport()

Method Summary

Modifier and Type	Method	Description
protected JarLoader	getJarLoader(Channel channel)
protected abstract URL	lookInCache(Channel channel, long sum1, long sum2)	Look up the local cache and return URL if found.
Future<URL>	resolve(Channel channel, long sum1, long sum2)	Looks up the jar in cache, and if not found, use JarLoader to retrieve it from the other side.
protected abstract URL	retrieve(Channel channel, long sum1, long sum2)	Retrieve the jar file from the given JarLoader, store it, then return the URL to that jar.

Methods inherited from class java.lang.Object

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

Constructor Detail

JarCacheSupport

public JarCacheSupport()

Method Detail

lookInCache

protected abstract URL lookInCache(Channel channel,
                                   long sum1,
                                   long sum2)
                            throws IOException,
                                   InterruptedException

Look up the local cache and return URL if found. Otherwise null (which will trigger a remote retrieval.)

Throws:

IOException

InterruptedException

retrieve

protected abstract URL retrieve(Channel channel,
                                long sum1,
                                long sum2)
                         throws IOException,
                                InterruptedException

Retrieve the jar file from the given JarLoader, store it, then return the URL to that jar.

Returns:

must not be null

Throws:

IOException

InterruptedException

resolve

@NonNull
public Future<URL> resolve(@NonNull
                           Channel channel,
                           long sum1,
                           long sum2)
                    throws IOException,
                           InterruptedException

Description copied from class: JarCache

Looks up the jar in cache, and if not found, use JarLoader to retrieve it from the other side.

This method must be concurrency-safe.

Specified by:

resolve in class JarCache

Parameters:

channel - Channel that needs this jar file.

Returns:

URL of the jar file.

Throws:

IOException

InterruptedException

getJarLoader

protected JarLoader getJarLoader(Channel channel)
                          throws InterruptedException

Throws:

InterruptedException