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/*-
* ============LICENSE_START=======================================================
* ONAP
* ================================================================================
* Copyright (C) 2020 AT&T Intellectual Property. All rights reserved.
* ================================================================================
* 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.
* ============LICENSE_END=========================================================
*/
package org.onap.policy.controlloop.actorserviceprovider;
import java.util.Arrays;
import java.util.LinkedHashMap;
import java.util.Map;
import org.onap.policy.common.utils.coder.Coder;
import org.onap.policy.common.utils.coder.CoderException;
import org.onap.policy.common.utils.coder.StandardCoder;
import org.slf4j.Logger;
import org.slf4j.LoggerFactory;
/**
* Actor utilities.
*/
public class Util {
private static final Logger logger = LoggerFactory.getLogger(Util.class);
private Util() {
// do nothing
}
/**
* Extracts an object's identity by invoking {@link Object#toString()} and returning
* the portion starting with "@". Extraction is done on-demand, when toString() is
* called on the result. This is typically used when logging.
*
* @param object object whose identity is to be extracted
* @return an object that will extract the source object's identity when this object's
* toString() method is called
*/
public static Object ident(Object object) {
return new DelayedIdentString(object);
}
/**
* Runs a function and logs a message if it throws an exception. Does <i>not</i>
* re-throw the exception.
*
* @param function function to be run
* @param exceptionMessage message to log if an exception is thrown
* @param exceptionArgs arguments to be passed to the logger
*/
public static void runFunction(Runnable function, String exceptionMessage, Object... exceptionArgs) {
try {
function.run();
} catch (RuntimeException ex) {
// create a new array containing the original arguments plus the exception
Object[] allArgs = Arrays.copyOf(exceptionArgs, exceptionArgs.length + 1);
allArgs[exceptionArgs.length] = ex;
logger.warn(exceptionMessage, allArgs);
}
}
/**
* Translates parameters from one class to another, typically from a Map to a POJO or
* vice versa.
*
* @param identifier identifier of the actor/operation being translated; used to build
* an exception message
* @param source source object to be translated
* @param clazz target class
* @return the translated object
*/
public static <T> T translate(String identifier, Object source, Class<T> clazz) {
Coder coder = new StandardCoder();
try {
String json = coder.encode(source);
return coder.decode(json, clazz);
} catch (CoderException | RuntimeException e) {
throw new IllegalArgumentException("cannot translate parameters for " + identifier, e);
}
}
/**
* Translates parameters to a Map.
*
* @param identifier identifier of the actor/operation being translated; used to build
* an exception message
* @param source source parameters
* @return the parameters, as a Map
*/
@SuppressWarnings("unchecked")
public static Map<String, Object> translateToMap(String identifier, Object source) {
if (source == null) {
return null;
}
return translate(identifier, source, LinkedHashMap.class);
}
}
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