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Core components to access jclouds services
/*
* 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.jclouds.logging;
import static com.google.common.collect.Iterables.find;
import java.util.NoSuchElementException;
import java.util.ServiceLoader;
import org.jclouds.logging.config.LoggingModule;
import org.jclouds.logging.jdk.config.JDKLoggingModule;
import com.google.common.base.Predicates;
/**
* The LoggingModules class provides static methods for accessing
* loggingModules.
*/
public class LoggingModules {
/**
* Returns the {@link LoggingModule}s located on the classpath via
* {@link java.util.ServiceLoader}.
*
*/
private static Iterable fromServiceLoader() {
return ServiceLoader.load(LoggingModule.class);
}
/**
* all available {@link LoggingModule}s
*/
public static Iterable all() {
return fromServiceLoader();
}
/**
* the first available {@link LoggingModule}s from
* {@link java.util.ServiceLoader} or {@link JDKLoggingModule}
*/
public static LoggingModule firstOrJDKLoggingModule() {
try {
return find(ServiceLoader.load(LoggingModule.class),
Predicates.not(Predicates.instanceOf(JDKLoggingModule.class)));
} catch (NoSuchElementException e) {
return new JDKLoggingModule();
}
}
}
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