/*
* ModeShape (http://www.modeshape.org)
*
* Licensed 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.modeshape.jcr;
import java.util.Arrays;
import java.util.LinkedHashSet;
import java.util.List;
import java.util.Objects;
import java.util.Set;
import java.util.stream.Collectors;
import org.jgroups.Channel;
import org.modeshape.common.util.DelegatingClassLoader;
import org.modeshape.common.util.StringURLClassLoader;
import org.modeshape.common.util.StringUtil;
/**
* An {@link Environment} that can be used with a standalone repository.
* <p>
* To use a custom Environment instance, simply create a {@link RepositoryConfiguration} as usual but then call the
* {@link RepositoryConfiguration#with(Environment)} with the Environment instance and then use the resulting
* RepositoryConfiguration instance.
* </p>
*/
public class LocalEnvironment implements Environment {
public LocalEnvironment() {
}
@Override
public Channel getChannel(String name) throws Exception {
return null;
}
@Override
public ClassLoader getClassLoader( Object caller,
String... classpathEntries ) {
caller = Objects.requireNonNull(caller);
Set<ClassLoader> delegates = new LinkedHashSet<>();
List<String> urls = Arrays.stream(classpathEntries).filter(StringUtil::notBlank).collect(Collectors.toList());
if (urls.isEmpty()) {
StringURLClassLoader urlClassLoader = new StringURLClassLoader(urls);
// only if any custom urls were parsed add this loader
if (urlClassLoader.getURLs().length > 0) {
delegates.add(urlClassLoader);
}
}
ClassLoader currentLoader = getClass().getClassLoader();
ClassLoader callerLoader = caller.getClass().getClassLoader();
ClassLoader tccl = Thread.currentThread().getContextClassLoader();
//add the TCCL to the list if it's not the same as the current loader or the fallback loader
if (!callerLoader.equals(tccl) && !currentLoader.equals(tccl)) {
delegates.add(tccl);
}
if (!callerLoader.equals(currentLoader)) {
// if the parent of fallback is the same as the current loader, just use that
if (currentLoader.equals(callerLoader.getParent())) {
currentLoader = callerLoader;
} else {
delegates.add(callerLoader);
}
}
return delegates.isEmpty() ? currentLoader : new DelegatingClassLoader(currentLoader, delegates);
}
}