org.jclouds.scriptbuilder.functionloader.BasicFunctionLoader Maven / Gradle / Ivy
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creates scripts that can be used to manage 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.scriptbuilder.functionloader;
import static com.google.common.base.Charsets.UTF_8;
import static com.google.common.io.Resources.getResource;
import static java.lang.String.format;
import static org.jclouds.scriptbuilder.domain.ShellToken.SH;
import java.io.IOException;
import org.jclouds.scriptbuilder.domain.OsFamily;
import com.google.common.io.Resources;
/**
* A {@link FunctionLoader} implementation which loads the target function from the classpath.
*/
public enum BasicFunctionLoader implements FunctionLoader {
INSTANCE;
/**
* Loads a function from the classpath using the current or the Thread Context Class Loader.
*
* @param function
* The function name to load.
* @param family
* This operating system family of the function.
* @return The function as {@link String}
* @throws FunctionNotFoundException
*/
@Override
public String loadFunction(String function, OsFamily family) throws FunctionNotFoundException {
try {
return Resources.toString(
getResource(BasicFunctionLoader.class, format("/functions/%s.%s", function, SH.to(family))), UTF_8);
} catch (IOException e) {
throw new FunctionNotFoundException(function, family, e);
}
}
}
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