/*
* Licensed to the Apache Software Foundation (ASF) under one or more
* contributor license agreements. See the NOTICE file distributed with
* this work for additional information regarding copyright ownership.
* The ASF licenses this file to You under the Apache License, Version 2.0
* (the "License"); you may not use this file except in compliance with
* the License. You may obtain a copy of the License at
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS,
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
* See the License for the specific language governing permissions and
* limitations under the License.
*
*/
package org.apache.ivy.plugins.repository.url;
import java.io.File;
import java.io.IOException;
import java.util.Iterator;
import java.util.List;
import org.apache.ivy.plugins.repository.AbstractRepository;
import org.apache.ivy.plugins.repository.BasicResource;
import org.apache.ivy.plugins.repository.Repository;
import org.apache.ivy.plugins.repository.Resource;
import org.apache.ivy.util.Message;
public class ChainedRepository extends AbstractRepository {
private List/* Repository */repositories;
public void setRepositories(List/* Repository */repositories) {
this.repositories = repositories;
}
public Resource getResource(String source) throws IOException {
Iterator it = repositories.iterator();
while (it.hasNext()) {
Repository repository = (Repository) it.next();
logTry(repository);
try {
Resource r = repository.getResource(source);
if (r != null && r.exists()) {
logSuccess(repository);
return r;
}
} catch (Exception e) {
logFailed(repository, e);
}
}
// resource that basically doesn't exists
return new BasicResource(source, false, 0, 0, true);
}
public void get(String source, File destination) throws IOException {
Iterator it = repositories.iterator();
while (it.hasNext()) {
Repository repository = (Repository) it.next();
logTry(repository);
boolean ok = false;
try {
repository.get(source, destination);
ok = true;
} catch (Exception e) {
logFailed(repository, e);
}
if (ok) {
logSuccess(repository);
return;
}
}
throw newIOEFail("copy " + source + " into " + destination);
}
public List list(String parent) throws IOException {
Iterator it = repositories.iterator();
while (it.hasNext()) {
Repository repository = (Repository) it.next();
logTry(repository);
try {
List list = repository.list(parent);
if (list != null) {
logSuccess(repository);
return list;
}
} catch (Exception e) {
logFailed(repository, e);
}
}
throw newIOEFail("list contents in " + parent);
}
private void logTry(Repository repository) {
Message.debug("Mirrored repository " + getName() + ": trying " + repository.getName());
}
private void logFailed(Repository repository, Exception e) {
Message.warn("Mirrored repository " + getName() + ": " + repository.getName()
+ " is not available", e);
Message.warn("Trying the next one in the mirror list...");
}
private void logSuccess(Repository repository) {
Message.debug("Mirrored repository " + getName() + ": success with " + repository.getName());
}
private IOException newIOEFail(String action) {
return new IOException("Mirrored repository " + getName() + ": fail to " + action
+ " with every listed mirror");
}
}