Java tutorial
/* Copyright 2013 Nationale-Nederlanden 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 nl.nn.adapterframework.extensions.rekenbox; import java.io.File; import java.text.DecimalFormat; import java.text.NumberFormat; import nl.nn.adapterframework.configuration.ConfigurationException; import nl.nn.adapterframework.core.IPipeLineSession; import nl.nn.adapterframework.core.PipeRunException; import nl.nn.adapterframework.core.PipeRunResult; import nl.nn.adapterframework.pipes.FixedForwardPipe; import nl.nn.adapterframework.util.Counter; import nl.nn.adapterframework.util.Misc; import org.apache.commons.lang.StringUtils; /** * Perform a call to a RekenBox. * * The inputmessage is written to a temporary file and passed as inputfile to the rekenbox. The contents of the outputfile of the * rekenbox is returned as output message. The name of the rekenbox, as determined from the inputfile, is optionally written to * the pipeLineSession. * * <p><b>Configuration:</b> * <table border="1"> * <tr><th>attributes</th><th>description</th><th>default</th></tr> * <tr><td>{@link #setForwardName(String) forwardName}</td><td>name of forward returned upon completion</td><td>"success"</td></tr> * <tr><td>{@link #setRekenBoxName(String) rekenBoxName}</td><td>fixed name of the rekenbox (or wrapper) to be called. If empty, the name is determined from the request</td><td> </td></tr> * <tr><td>{@link #setRunPath(String) runPath}</td><td>directory on server where rekenbox-executable can be found</td><td> </td></tr> * <tr><td>{@link #setTemplateDir(String) templateDir}</td><td>rekenbox template directory on server</td><td> </td></tr> * <tr><td>{@link #setInputOutputDirectory(String) inputOutputDirectory}</td><td>directory on server where input and output files are (temporarily) stored</td><td> </td></tr> * <tr><td>{@link #setCommandLineType(String) commandLineType}</td><td>Format of commandline of rekenbox. Possible values * <ul> * <li>"straight": rekenbox is called like: rekenbox.exe inputFileName outputFileName templateDir</li> * <li>"switches": rekenbox is called like: rekenbox.exe /IinputFileName /UoutputFileName /PtemplateDir</li> * <li>"redirected": rekenbox is called like: rekenbox.exe inputFileName templateDir > outputFileName; (This method has not been fully tested)</li> * </ul></td><td>"straigth"</td></tr> * <tr><td>{@link #setExecutableExtension(String) executableExtension}</td><td>extension of rekenbox-executable</td><td>exe</td></tr> * <tr><td>{@link #setCleanup(boolean) cleanup}</td><td>if true, input and output files are removed after the call to the rekenbox is finished</td><td>true</td></tr> * <tr><td>{@link #setRekenboxSessionKey(String) rekenboxSessionKey}</td><td>key in {@link nl.nn.adapterframework.core.IPipeLineSession pipeLineSession} to store rekenbox name in</td><td> </td></tr> * <tr><td>{@link #setDataFilenamePrefix(String) dataFilenamePrefix}</td><td>first part of filenames that communicate requests and replies to rekenbox</td><td>rb</td></tr> * <tr><td>{@link #setMaxRequestNumber(long) maxRequestNumber}</td><td>maximal number that will be concatenated to dataFilenamePrefix</td><td>1000</td></tr> * </table> * </p> * <p><b>Exits:</b> * <table border="1"> * <tr><th>state</th><th>condition</th></tr> * <tr><td>"success"</td><td>default</td></tr> * <tr><td><i>{@link #setForwardName(String) forwardName}</i></td><td>if specified</td></tr> * </table> * </p> * * <p><b>Note:</b><br> * The rekenbox-name is currently determined from the first 8 characters of the file, or up * to the first space (' ') or colon (':') character. Beware that if the first character of the * file is a newline character or something similar, less characters are available to pass the * rekenbox-name on. Especially if the inputmessages are constructed by means of an XSLT-stylesheet, * messages often start with a newline character. * </p> * @author Gerrit van Brakel */ public class RekenBoxCaller extends FixedForwardPipe { private String runPath = ""; private String executableExtension = "exe"; //bat, com or exe private String inputOutputDirectory; private String templateDir; private String rekenBoxName; // can be set for fixed rekenbox private boolean cleanup = true; private String commandLineType = "straight"; private String rekenboxSessionKey = null; // output-property to communicate the name of the rekenbox to adios2Xml converter private String dataFilenamePrefix = "rb"; private long maxRequestNumber = 1000; private NumberFormat formatter; private static Counter requestCounter = new Counter(0); private File inputOutputDir; public void configure() throws ConfigurationException { super.configure(); if (StringUtils.isEmpty(getCommandLineType()) || !(getCommandLineType().equals("straight") || getCommandLineType().equals("switches") || getCommandLineType().equals("redirected"))) { throw new ConfigurationException(getLogPrefix(null) + "commandLineType [" + getCommandLineType() + "] must be one of 'straigth', 'switches' or 'redirected'"); } inputOutputDir = new File(getInputOutputDirectory()); if (!inputOutputDir.exists()) { throw new ConfigurationException( getLogPrefix(null) + "inputOutputDirectory [" + getInputOutputDirectory() + "] does not exist"); } if (!inputOutputDir.isDirectory()) { throw new ConfigurationException(getLogPrefix(null) + "inputOutputDirectory [" + getInputOutputDirectory() + "] is not a directory"); } formatter = new DecimalFormat("000000000000".substring(0, Long.toString(getMaxRequestNumber()).length())); String baseFileName = getBaseFileName(); log.debug(getLogPrefix(null) + "first filename will be [" + baseFileName + "]"); requestCounter.decrease(); } protected boolean inputFileExists(long requestno, String extension) { return new File(inputOutputDir, makeFileName(requestno, extension)).exists(); } protected String makeFileName(long requestno, String extension) { return getDataFilenamePrefix() + formatter.format(requestno) + extension; } public String getBaseFileName() { boolean didReset = false; long requestno; for (requestno = requestCounter.increase(); inputFileExists(requestno, ".INV"); requestno = requestCounter.increase()) { if (!didReset && requestno >= getMaxRequestNumber()) { synchronized (requestCounter) { if (requestCounter.getValue() >= getMaxRequestNumber()) { requestCounter.decrease(getMaxRequestNumber()); } } } } return makeFileName(requestno, ""); } /** * positie 1 t/m 8 bepalen de naam van de executable, of tot aan de ':' (wat het eerst komt) */ public PipeRunResult doPipe(Object input, IPipeLineSession session) throws PipeRunException { if (!(input instanceof String)) throw new PipeRunException(this, getLogPrefix(session) + "expected java.lang.String, got [" + input.getClass().getName() + "], value [" + input + "]"); String sInput = (String) input; // log.debug("Pipe ["+name+"] got input ["+sInput+"]"); String rekenboxName = getRekenBoxName(); if (StringUtils.isEmpty(rekenboxName)) { rekenboxName = sInput; if (rekenboxName.length() >= 8) rekenboxName = rekenboxName.substring(0, 8); // find end or position of first colon. rekenboxName = (rekenboxName + ":").substring(0, (rekenboxName + ":").indexOf(":")).trim(); } if (rekenboxName.equals("")) { throw new PipeRunException(this, getLogPrefix(session) + "cannot determine rekenboxName from [" + sInput + "]"); } int i = rekenboxName.length(); int n = sInput.length(); while (i < n && " :;".indexOf(sInput.charAt(i)) >= 0) { i++; } String rekenboxInput = sInput.substring(i); String exeName = runPath + rekenboxName + "." + executableExtension; if (!(new File(exeName).exists())) { throw new PipeRunException(this, getLogPrefix(session) + "executable file [" + exeName + "] does not exist; requestmessage: [" + sInput + "]"); } if (getRekenboxSessionKey() != null) { session.put(getRekenboxSessionKey(), rekenboxName); } String baseFileName = getBaseFileName(); String inputFileName = inputOutputDirectory + baseFileName + ".INV"; String outputFileName = inputOutputDirectory + baseFileName + ".UIT"; String callAndArgs; String callType = getCommandLineType(); if ((callType == null) || (callType.equals("switches"))) { callAndArgs = exeName + " /I" + inputFileName + " /U" + outputFileName + " /P" + templateDir; } else if (callType.equals("straight")) { callAndArgs = exeName + " " + inputFileName + " " + outputFileName + " " + templateDir; } else if (callType.equals("redirected")) { callAndArgs = exeName + " " + inputFileName + " " + templateDir; } else throw new PipeRunException(this, getLogPrefix(session) + "unknown commandLineType: " + callType); try { // put input in a file Misc.stringToFile(rekenboxInput, inputFileName); // precreating outputfile is necessary for L76HB000 log.debug(getLogPrefix(session) + " precreating outputfile [" + outputFileName + "]"); new File(outputFileName).createNewFile(); log.debug(getLogPrefix(session) + " will issue command [" + callAndArgs + "]"); // execute Runtime rt = Runtime.getRuntime(); Process child = rt.exec(callAndArgs); String result; if (callType.equals("redirected")) { result = Misc.streamToString(child.getInputStream(), "\n", true); } else { child.waitFor(); // read output result = Misc.fileToString(outputFileName, "\n", true); } log.debug(getLogPrefix(session) + " completed call. Process exit code is: " + child.exitValue()); // log.debug("Pipe ["+name+"] retrieved result ["+result+"]"); return new PipeRunResult(getForward(), result); } catch (Exception e) { throw new PipeRunException(this, getLogPrefix(session) + "got Exception executing rekenbox", e); } finally { // cleanup if (isCleanup()) { new File(inputFileName).delete(); new File(outputFileName).delete(); } } } public void setRekenBoxName(String string) { rekenBoxName = string; } public String getRekenBoxName() { return rekenBoxName; } public void setRunPath(String newRunPath) { runPath = newRunPath; } public String getRunPath() { return runPath; } public void setTemplateDir(String newTemplateDir) { templateDir = newTemplateDir; } public String getTemplateDir() { return templateDir; } public void setInputOutputDirectory(String newInputOutputDirectory) { inputOutputDirectory = newInputOutputDirectory; } public String getInputOutputDirectory() { return inputOutputDirectory; } public void setCommandLineType(String newCommandLineType) { commandLineType = newCommandLineType; } public String getCommandLineType() { return commandLineType; } public void setExecutableExtension(String newExecutableExtension) { executableExtension = newExecutableExtension; } public String getExecutableExtension() { return executableExtension; } public void setCleanup(boolean newCleanup) { cleanup = newCleanup; } public boolean isCleanup() { return cleanup; } public void setRekenboxSessionKey(String newRekenboxSessionKey) { rekenboxSessionKey = newRekenboxSessionKey; } public String getRekenboxSessionKey() { return rekenboxSessionKey; } public void setDataFilenamePrefix(String string) { dataFilenamePrefix = string; } public String getDataFilenamePrefix() { return dataFilenamePrefix; } public void setMaxRequestNumber(long l) { maxRequestNumber = l; } public long getMaxRequestNumber() { return maxRequestNumber; } }