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/*-
* ============LICENSE_START=======================================================
* OPENECOMP - MSO
* ================================================================================
* Copyright (C) 2017 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.openecomp.mso.bpmn.core;
import java.io.BufferedReader;
import java.io.IOException;
import java.io.InputStream;
import java.io.InputStreamReader;
import org.camunda.bpm.engine.ProcessEngineException;
import org.camunda.bpm.engine.delegate.DelegateExecution;
import org.camunda.bpm.engine.delegate.Expression;
import org.openecomp.mso.logger.MsoLogger;
/**
* Conditionally reads the contents of a resource file as a string and stores it
* in an execution variable. The file is read only if the value of the input
* variable is null.
* <p>
* Required fields:<br/><br/>
* file: the resource file path<br/>
* inputVariable: the input variable name<br/>
* outputVariable: the output variable name<br/>
*/
public class ReadFileTask extends BaseTask {
private Expression file;
private Expression inputVariable;
private Expression outputVariable;
private static MsoLogger msoLogger = MsoLogger.getMsoLogger(MsoLogger.Catalog.BPEL);
public void execute(DelegateExecution execution) throws Exception {
if (msoLogger.isDebugEnabled()) {
msoLogger.debug("Started Executing " + getTaskName());
}
String theInputVariable =
getStringField(inputVariable, execution, "inputVariable");
String theOutputVariable =
getOutputField(outputVariable, execution, "outputVariable");
String theFile =getStringField(file, execution, "file");
if (msoLogger.isDebugEnabled()) {
msoLogger.debug("inputVariable = " + theInputVariable
+ " outputVariable = " + theOutputVariable
+ "file = " + theFile);
}
Boolean shouldFail = (Boolean) execution.getVariable("shouldFail");
if (shouldFail != null && shouldFail) {
throw new ProcessEngineException(getClass().getSimpleName() + " Failed");
}
Object value = execution.getVariable(theInputVariable);
if (value == null) {
InputStream xmlStream = null;
try {
xmlStream = getClass().getResourceAsStream(theFile);
if (xmlStream == null) {
throw new IOException("Resource not found: " + theFile);
}
BufferedReader reader = new BufferedReader(new InputStreamReader(xmlStream));
StringBuilder output = new StringBuilder();
String line;
while ((line = reader.readLine()) != null) {
output.append(line);
}
xmlStream.close();
xmlStream = null;
value = output.toString();
} finally {
if (xmlStream != null) {
try {
xmlStream.close();
} catch (Exception e) {
// Do nothing
}
}
}
}
execution.setVariable(theInputVariable, value);
execution.setVariable(theOutputVariable, value);
System.out.println("ServiceInput - " + execution.getVariable("gServiceInput"));
if (msoLogger.isDebugEnabled()) {
msoLogger.debug("Done Executing " + getTaskName());
}
}
}
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