Java tutorial
/* * ### * Phresco Framework Implementation * %% * Copyright (C) 1999 - 2012 Photon Infotech Inc. * %% * 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 com.photon.phresco.framework.impl; import hudson.cli.CLI; import java.io.BufferedInputStream; import java.io.ByteArrayInputStream; import java.io.ByteArrayOutputStream; import java.io.DataInputStream; import java.io.File; import java.io.FileOutputStream; import java.io.IOException; import java.io.InputStream; import java.io.OutputStream; import java.net.InetAddress; import java.net.MalformedURLException; import java.net.URL; import java.text.DateFormat; import java.text.SimpleDateFormat; import java.util.ArrayList; import java.util.Calendar; import java.util.List; import java.util.Map; import org.apache.commons.collections.CollectionUtils; import org.apache.http.client.HttpClient; import org.apache.http.client.ResponseHandler; import org.apache.http.client.methods.HttpGet; import org.apache.http.impl.client.BasicResponseHandler; import org.apache.http.impl.client.DefaultHttpClient; import org.apache.log4j.Logger; import org.jdom.JDOMException; import com.google.gson.Gson; import com.google.gson.JsonArray; import com.google.gson.JsonElement; import com.google.gson.JsonObject; import com.google.gson.JsonParser; import com.photon.phresco.commons.BuildInfo; import com.photon.phresco.commons.CIBuild; import com.photon.phresco.commons.CIJob; import com.photon.phresco.commons.CIJobStatus; import com.photon.phresco.commons.FrameworkConstants; import com.photon.phresco.exception.PhrescoException; import com.photon.phresco.framework.PhrescoFrameworkFactory; import com.photon.phresco.framework.api.CIManager; import com.photon.phresco.framework.api.ProjectAdministrator; import com.photon.phresco.util.Utility; import com.sun.jersey.api.client.ClientResponse; public class CIManagerImpl implements CIManager, FrameworkConstants { private static final Logger S_LOGGER = Logger.getLogger(CIManagerImpl.class); private static Boolean debugEnabled = S_LOGGER.isDebugEnabled(); private static final String JENKINS_URL = "http://localhost:3579/ci"; private CLI cli = null; @Override public CIJobStatus createJob(CIJob job) throws PhrescoException { if (debugEnabled) { S_LOGGER.debug("Entering Method CIManagerImpl.createJob(CIJob job)"); } return doJob(job, FrameworkConstants.CI_CREATE_JOB_COMMAND); } @Override public CIJobStatus updateJob(CIJob job) throws PhrescoException { if (debugEnabled) { S_LOGGER.debug("Entering Method CIManagerImpl.createJob(CIJob job)"); } return doJob(job, FrameworkConstants.CI_UPDATE_JOB_COMMAND); } private CIJobStatus doJob(CIJob job, String jobType) throws PhrescoException { S_LOGGER.debug("Entering Method CIManagerImpl.createJob(CIJob job)"); try { cli = getCLI(job); List<String> argList = new ArrayList<String>(); argList.add(jobType); argList.add(job.getName()); String configPath = PhrescoFrameworkFactory.getServiceManager().getCiConfigPath(job.getRepoType()); ConfigProcessor processor = new ConfigProcessor(new URL(configPath)); customizeNodes(processor, job); ByteArrayOutputStream baos = new ByteArrayOutputStream(); S_LOGGER.debug("argList " + argList.toString()); int result = cli.execute(argList, processor.getConfigAsStream(), System.out, baos); String message = "Job created successfully"; if (result == -1) { byte[] byteArray = baos.toByteArray(); message = new String(byteArray); } S_LOGGER.debug("message " + message); //when svn is selected credential value has to set if (SVN.equals(job.getRepoType())) { setSvnCredential(job); } setMailCredential(job); return new CIJobStatus(result, message); } catch (IOException e) { throw new PhrescoException(e); } catch (JDOMException e) { throw new PhrescoException(e); } finally { if (cli != null) { try { cli.close(); } catch (IOException e) { if (debugEnabled) { S_LOGGER.error(e.getLocalizedMessage()); } } catch (InterruptedException e) { if (debugEnabled) { S_LOGGER.error(e.getLocalizedMessage()); } } } } } private void setSvnCredential(CIJob job) throws JDOMException, IOException { S_LOGGER.debug("Entering Method CIManagerImpl.setSvnCredential"); try { InputStream credentialXml = PhrescoFrameworkFactory.getServiceManager().getCredentialXml(); SvnProcessor processor = new SvnProcessor(credentialXml); DataInputStream in = new DataInputStream(credentialXml); while (in.available() != 0) { System.out.println(in.readLine()); } in.close(); processor.changeNodeValue("credentials/entry//userName", job.getUserName()); processor.changeNodeValue("credentials/entry//password", job.getPassword()); processor.writeStream(new File(Utility.getJenkinsHome() + File.separator + job.getName())); //jenkins home location String jenkinsJobHome = System.getenv(JENKINS_HOME); StringBuilder builder = new StringBuilder(jenkinsJobHome); builder.append(File.separator); processor.writeStream(new File(builder.toString() + CI_CREDENTIAL_XML)); } catch (Exception e) { S_LOGGER.error( "Entered into the catch block of CIManagerImpl.setSvnCredential " + e.getLocalizedMessage()); } } public void setMailCredential(CIJob job) { S_LOGGER.debug("Entering Method CIManagerImpl.setMailCredential"); try { InputStream credentialXml = PhrescoFrameworkFactory.getServiceManager().getMailerXml(); SvnProcessor processor = new SvnProcessor(credentialXml); DataInputStream in = new DataInputStream(credentialXml); while (in.available() != 0) { System.out.println(in.readLine()); } in.close(); // Mail have to with jenkins running email address InetAddress ownIP = InetAddress.getLocalHost(); processor.changeNodeValue(CI_HUDSONURL, HTTP_PROTOCOL + PROTOCOL_POSTFIX + ownIP.getHostAddress() + COLON + job.getJenkinsPort() + FORWARD_SLASH + CI + FORWARD_SLASH); processor.changeNodeValue("smtpAuthUsername", job.getSenderEmailId()); processor.changeNodeValue("smtpAuthPassword", job.getSenderEmailPassword()); processor.changeNodeValue("adminAddress", job.getSenderEmailId()); //jenkins home location String jenkinsJobHome = System.getenv(JENKINS_HOME); StringBuilder builder = new StringBuilder(jenkinsJobHome); builder.append(File.separator); processor.writeStream(new File(builder.toString() + CI_MAILER_XML)); } catch (Exception e) { S_LOGGER.error( "Entered into the catch block of CIManagerImpl.setMailCredential " + e.getLocalizedMessage()); } } public void getJdkHomeXml() throws PhrescoException { S_LOGGER.debug("Entering Method CIManagerImpl.getJdkHomeXml"); try { InputStream JDKHomeXmlStream = PhrescoFrameworkFactory.getServiceManager().getJdkHomeXml(); String jenkinsJobHome = System.getenv(JENKINS_HOME); StringBuilder builder = new StringBuilder(jenkinsJobHome); builder.append(File.separator); File f = new File(builder.toString() + CI_JDK_HOME_XML); streamToFile(f, JDKHomeXmlStream); } catch (Exception e) { S_LOGGER.error("Entered into the catch block of CIManagerImpl.getJdkHomeXml" + e.getLocalizedMessage()); } } public void streamToFile(File dest, InputStream ip) { OutputStream out; try { out = new FileOutputStream(dest); byte buf[] = new byte[5024]; int len; while ((len = ip.read(buf)) > 0) { out.write(buf, 0, len); } out.close(); ip.close(); } catch (Exception e) { S_LOGGER.error("Entered into the catch block of CIManagerImpl.streamToFile" + e.getLocalizedMessage()); } } public void getMavenHomeXml() throws PhrescoException { if (debugEnabled) { S_LOGGER.debug("Entering Method CIManagerImpl.getMavenHomeXml"); } try { InputStream MAVENHomeXmlStream = PhrescoFrameworkFactory.getServiceManager().getMavenHomeXml(); String jenkinsJobHome = System.getenv(JENKINS_HOME); StringBuilder builder = new StringBuilder(jenkinsJobHome); builder.append(File.separator); File f = new File(builder.toString() + CI_MAVEN_HOME_XML); streamToFile(f, MAVENHomeXmlStream); } catch (Exception e) { if (debugEnabled) { S_LOGGER.error( "Entered into the catch block of CIManagerImpl.getMavenHomeXml" + e.getLocalizedMessage()); } } } @Override public CIJobStatus buildJob(CIJob job) throws PhrescoException { S_LOGGER.debug("Entering Method CIManagerImpl.buildJob(CIJob job)"); cli = getCLI(job); List<String> argList = new ArrayList<String>(); argList.add(FrameworkConstants.CI_BUILD_JOB_COMMAND); argList.add(job.getName()); try { int status = cli.execute(argList); String message = FrameworkConstants.CI_BUILD_STARTED; if (status == FrameworkConstants.JOB_STATUS_NOTOK) { message = FrameworkConstants.CI_BUILD_STARTING_ERROR; } return new CIJobStatus(status, message); } finally { if (cli != null) { try { cli.close(); } catch (IOException e) { if (debugEnabled) { S_LOGGER.error(e.getLocalizedMessage()); } } catch (InterruptedException e) { if (debugEnabled) { S_LOGGER.error(e.getLocalizedMessage()); } } } } } private JsonArray getBuildsArray(CIJob job) throws PhrescoException { try { String jenkinsUrl = "http://" + job.getJenkinsUrl() + ":" + job.getJenkinsPort() + "/ci/"; String jobNameUtf8 = job.getName().replace(" ", "%20"); String buildsJsonUrl = jenkinsUrl + "job/" + jobNameUtf8 + "/api/json"; String jsonResponse = getJsonResponse(buildsJsonUrl); JsonParser parser = new JsonParser(); JsonElement jsonElement = parser.parse(jsonResponse); JsonObject jsonObject = jsonElement.getAsJsonObject(); JsonElement element = jsonObject.get(FrameworkConstants.CI_JOB_JSON_BUILDS); JsonArray jsonArray = element.getAsJsonArray(); return jsonArray; } catch (Exception e) { throw new PhrescoException(e); } } @Override public List<CIBuild> getCIBuilds(CIJob job) throws PhrescoException { S_LOGGER.debug("Entering Method CIManagerImpl.getCIBuilds(CIJob job)"); List<CIBuild> ciBuilds = null; try { S_LOGGER.debug("getCIBuilds() JobName = " + job.getName()); JsonArray jsonArray = getBuildsArray(job); ciBuilds = new ArrayList<CIBuild>(jsonArray.size()); Gson gson = new Gson(); CIBuild ciBuild = null; for (int i = 0; i < jsonArray.size(); i++) { ciBuild = gson.fromJson(jsonArray.get(i), CIBuild.class); setBuildStatus(ciBuild, job); String buildUrl = ciBuild.getUrl(); String jenkinUrl = job.getJenkinsUrl() + ":" + job.getJenkinsPort(); buildUrl = buildUrl.replaceAll("localhost:" + job.getJenkinsPort(), jenkinUrl); // when displaying url it should display setup machine ip ciBuild.setUrl(buildUrl); ciBuilds.add(ciBuild); } } catch (Exception e) { S_LOGGER.debug("Entering Method CIManagerImpl.getCIBuilds(CIJob job)"); } return ciBuilds; } private void setBuildStatus(CIBuild ciBuild, CIJob job) throws PhrescoException { S_LOGGER.debug("Entering Method CIManagerImpl.setBuildStatus(CIBuild ciBuild)"); S_LOGGER.debug("setBuildStatus() url = " + ciBuild.getUrl()); String buildUrl = ciBuild.getUrl(); String jenkinsUrl = job.getJenkinsUrl() + ":" + job.getJenkinsPort(); buildUrl = buildUrl.replaceAll("localhost:" + job.getJenkinsPort(), jenkinsUrl); // display the jenkins running url in ci list String response = getJsonResponse(buildUrl + "api/json"); JsonParser parser = new JsonParser(); JsonElement jsonElement = parser.parse(response); JsonObject jsonObject = jsonElement.getAsJsonObject(); JsonElement resultJson = jsonObject.get(FrameworkConstants.CI_JOB_BUILD_RESULT); JsonElement idJson = jsonObject.get(FrameworkConstants.CI_JOB_BUILD_ID); JsonElement timeJson = jsonObject.get(FrameworkConstants.CI_JOB_BUILD_TIME_STAMP); JsonArray asJsonArray = jsonObject.getAsJsonArray(FrameworkConstants.CI_JOB_BUILD_ARTIFACTS); if (jsonObject.get(FrameworkConstants.CI_JOB_BUILD_RESULT).toString().equals("null")) { // when build is result is not known ciBuild.setStatus("INPROGRESS"); } else if (resultJson.getAsString().equals("SUCCESS") && asJsonArray.size() < 1) { // when build is success and zip relative path is not added in json ciBuild.setStatus("INPROGRESS"); } else { ciBuild.setStatus(resultJson.getAsString()); //download path for (JsonElement jsonArtElement : asJsonArray) { ciBuild.setDownload(jsonArtElement.getAsJsonObject() .get(FrameworkConstants.CI_JOB_BUILD_DOWNLOAD_PATH).toString()); } } ciBuild.setId(idJson.getAsString()); String dispFormat = "dd/MM/yyyy hh:mm:ss"; ciBuild.setTimeStamp(getDate(timeJson.getAsString(), dispFormat)); } private String getDate(String timeStampStr, String format) { DateFormat formatter = new SimpleDateFormat(format); long timeStamp = Long.parseLong(timeStampStr); Calendar calendar = Calendar.getInstance(); calendar.setTimeInMillis(timeStamp); return formatter.format(calendar.getTime()); } private String getJsonResponse(String jsonUrl) throws PhrescoException { S_LOGGER.debug("Entering Method CIManagerImpl.getJsonResponse(String jsonUrl)"); S_LOGGER.debug("getJsonResponse() JSonUrl = " + jsonUrl); try { HttpClient httpClient = new DefaultHttpClient(); HttpGet httpget = new HttpGet(jsonUrl); ResponseHandler<String> responseHandler = new BasicResponseHandler(); return httpClient.execute(httpget, responseHandler); } catch (IOException e) { throw new PhrescoException(e); } } private CLI getCLI(CIJob job) throws PhrescoException { S_LOGGER.debug("Entering Method CIManagerImpl.getCLI()"); // FrameworkConfiguration frameworkConfig = PhrescoFrameworkFactory.getFrameworkConfig(); String jenkinsUrl = "http://" + job.getJenkinsUrl() + ":" + job.getJenkinsPort() + "/ci/"; try { return new CLI(new URL(jenkinsUrl)); } catch (MalformedURLException e) { throw new PhrescoException(e); } catch (IOException e) { throw new PhrescoException(e); } catch (InterruptedException e) { throw new PhrescoException(e); } } public void customizeNodes(ConfigProcessor processor, CIJob job) throws JDOMException, PhrescoException { //SVN url customization if (SVN.equals(job.getRepoType())) { processor.changeNodeValue("scm/locations//remote", job.getSvnUrl()); } else { processor.changeNodeValue("scm/userRemoteConfigs//url", job.getSvnUrl()); processor.changeNodeValue("scm/branches//name", job.getBranch()); } //Schedule expression customization processor.changeNodeValue("triggers//spec", job.getScheduleExpression()); //Triggers Implementation List<String> triggers = job.getTriggers(); processor.createTriggers("triggers", triggers, job.getScheduleExpression()); //Maven command customization processor.changeNodeValue("goals", job.getMvnCommand()); //Recipients customization Map<String, String> email = job.getEmail(); //Failure Reception list processor.changeNodeValue( "publishers//hudson.plugins.emailext.ExtendedEmailPublisher//configuredTriggers//hudson.plugins.emailext.plugins.trigger.FailureTrigger//email//recipientList", (String) email.get("failureEmailssuccessEmails")); //Success Reception list processor.changeNodeValue( "publishers//hudson.plugins.emailext.ExtendedEmailPublisher//configuredTriggers//hudson.plugins.emailext.plugins.trigger.SuccessTrigger//email//recipientList", (String) email.get("successEmails")); //enable collabnet file release plugin integration if (job.isEnableBuildRelease()) { processor.enableCollabNetBuildReleasePlugin(job); } } public static void main(String[] args) { // try { // CIManagerImpl managerImpl = new CIManagerImpl(); // managerImpl.validate(); // } catch(Exception e) { // e.printStackTrace(); // } } private void validate() throws IOException, InterruptedException { S_LOGGER.debug("Entering Method CIManagerImpl.validate()"); CLI validateCLI = new CLI(new URL("http://localhost:3579/ci/")); List<String> argList = new ArrayList<String>(); argList.add("build"); argList.add("NewJob"); Gson gson = new Gson(); JsonParser parser = new JsonParser(); ByteArrayOutputStream baos = new ByteArrayOutputStream(); byte[] data = new byte[4]; ByteArrayInputStream inputStream = new ByteArrayInputStream(data); BufferedInputStream stream = new BufferedInputStream(System.in); int execute = validateCLI.execute(argList, inputStream, baos, baos); validateCLI.close(); byte[] outData = new byte[2]; int read; while ((read = inputStream.read(outData)) != -1) { System.out.print(new String(outData)); } inputStream.close(); // byte[] byteArray = baos.toByteArray(); // baos.flush(); // baos.close(); } @Override public int getTotalBuilds(CIJob job) throws PhrescoException { S_LOGGER.debug("Entering Method CIManagerImpl.getTotalBuilds(CIJob job)"); S_LOGGER.debug("getCIBuilds() JobName = " + job.getName()); JsonArray jsonArray = getBuildsArray(job); Gson gson = new Gson(); CIBuild ciBuild = null; if (jsonArray.size() > 0) { ciBuild = gson.fromJson(jsonArray.get(0), CIBuild.class); String buildUrl = ciBuild.getUrl(); String jenkinsUrl = job.getJenkinsUrl() + ":" + job.getJenkinsPort(); buildUrl = buildUrl.replaceAll("localhost:" + job.getJenkinsPort(), jenkinsUrl); // display the jenkins running url in ci list String response = getJsonResponse(buildUrl + "api/json"); JsonParser parser = new JsonParser(); JsonElement jsonElement = parser.parse(response); JsonObject jsonObject = jsonElement.getAsJsonObject(); JsonElement resultJson = jsonObject.get(FrameworkConstants.CI_JOB_BUILD_RESULT); JsonArray asJsonArray = jsonObject.getAsJsonArray(FrameworkConstants.CI_JOB_BUILD_ARTIFACTS); if (jsonObject.get(FrameworkConstants.CI_JOB_BUILD_RESULT).toString().equals("null")) { // when build result is not known return -1; // it indicates the job is in progress and not yet completed } else if (resultJson.getAsString().equals("SUCCESS") && asJsonArray.size() < 1) { // when build is success and build zip relative path is unknown return -1; } else { return jsonArray.size(); } } else { return -1; // When the project is build first time, } } public CIJobStatus deleteCI(CIJob job, List<String> builds) throws PhrescoException { S_LOGGER.debug("Entering Method CIManagerImpl.deleteCI(CIJob job)"); S_LOGGER.debug("Job name " + job.getName()); cli = getCLI(job); String deleteType = null; List<String> argList = new ArrayList<String>(); S_LOGGER.debug("job name " + job.getName()); S_LOGGER.debug("Builds " + builds); if (CollectionUtils.isEmpty(builds)) { // delete job S_LOGGER.debug("Job deletion started"); S_LOGGER.debug("Command " + FrameworkConstants.CI_JOB_DELETE_COMMAND); deleteType = "Job"; argList.add(FrameworkConstants.CI_JOB_DELETE_COMMAND); argList.add(job.getName()); } else { // delete Build S_LOGGER.debug("Build deletion started"); deleteType = "Build"; argList.add(FrameworkConstants.CI_BUILD_DELETE_COMMAND); argList.add(job.getName()); StringBuilder result = new StringBuilder(); for (String string : builds) { result.append(string); result.append(","); } String buildNos = result.substring(0, result.length() - 1); argList.add(buildNos); S_LOGGER.debug("Command " + FrameworkConstants.CI_BUILD_DELETE_COMMAND); S_LOGGER.debug("Build numbers " + buildNos); } try { int status = cli.execute(argList); String message = deleteType + " deletion started in jenkins"; if (status == FrameworkConstants.JOB_STATUS_NOTOK) { deleteType = deleteType.substring(0, 1).toLowerCase() + deleteType.substring(1); message = "Error while deleting " + deleteType + " in jenkins"; } if (debugEnabled) { S_LOGGER.debug("Delete CI Status " + status); S_LOGGER.debug("Delete CI Message " + message); } return new CIJobStatus(status, message); } finally { if (cli != null) { try { cli.close(); } catch (IOException e) { if (debugEnabled) { S_LOGGER.error("Entered into catch block of CIManagerImpl.deleteCI(CIJob job) " + e.getLocalizedMessage()); } } catch (InterruptedException e) { if (debugEnabled) { S_LOGGER.error("Entered into catch block of CIManagerImpl.deleteCI(CIJob job) " + e.getLocalizedMessage()); } } } } } public int getProgressInBuild(CIJob job) throws PhrescoException { S_LOGGER.debug("Entering Method CIManagerImpl.isBuilding(CIJob job)"); String jenkinsUrl = "http://" + job.getJenkinsUrl() + ":" + job.getJenkinsPort() + "/ci/"; String isBuildingUrlUrl = "computer/api/xml?xpath=/computerSet/busyExecutors/text()"; String jsonResponse = getJsonResponse(jenkinsUrl + isBuildingUrlUrl); int buidInProgress = Integer.parseInt(jsonResponse); S_LOGGER.debug("buidInProgress " + buidInProgress); return buidInProgress; } public void getEmailExtPlugin() throws PhrescoException { S_LOGGER.debug("Entering Method CIManagerImpl.getEmailExtPlugin"); try { ClientResponse response = PhrescoFrameworkFactory.getServiceManager().getEmailExtPlugin(); S_LOGGER.debug("createProject response code " + response.getStatus()); InputStream pluginStream = response.getEntityInputStream(); String pluginDir = Utility.getJenkinsHomePluginDir(); File pluginFile = new File(pluginDir + CI_MAIL_EXT_PLUGIN); streamToFile(pluginFile, pluginStream); } catch (Exception e) { S_LOGGER.error( "Entered into the catch block of CIManagerImpl.getEmailExtPlugin" + e.getLocalizedMessage()); } } public void deleteDoNotCheckin(CIJob job) throws PhrescoException { S_LOGGER.debug("Entering Method CIManagerImpl.deleteBuilds"); try { String jenkinsDataHome = System.getenv(JENKINS_HOME); StringBuilder builder = new StringBuilder(jenkinsDataHome); builder.append(File.separator); builder.append(WORKSPACE_DIR); builder.append(File.separator); builder.append(job.getName()); builder.append(File.separator); builder.append(CHECKIN_DIR); builder.append(File.separator); builder.append(BUILD_PATH); boolean deleteDir = deleteDir(new File(builder.toString())); } catch (Exception e) { S_LOGGER.error("Entered into the catch block of CIManagerImpl.deleteBuilds" + e.getLocalizedMessage()); } } @Override public List<BuildInfo> getBuildInfos(CIJob job) throws PhrescoException { S_LOGGER.debug("Entering Method CIManagerImpl.getBuildInfos"); List<BuildInfo> buildInfo = null; try { ProjectAdministrator administrator = PhrescoFrameworkFactory.getProjectAdministrator(); String jenkinsDataHome = System.getenv(JENKINS_HOME); StringBuilder builder = new StringBuilder(jenkinsDataHome); builder.append(File.separator); builder.append(WORKSPACE_DIR); builder.append(File.separator); builder.append(job.getName()); builder.append(File.separator); builder.append(BUILD_DIR); builder.append(File.separator); builder.append(BUILD_INFO_FILE_NAME); buildInfo = administrator.readBuildInfo(new File(builder.toString())); } catch (Exception e) { S_LOGGER.error("Entered into the catch block of CIManagerImpl.getBuildInfos" + e.getLocalizedMessage()); } return buildInfo; } @Override public BuildInfo getBuildInfo(CIJob job, int buildNumber) throws PhrescoException { List<BuildInfo> buildInfos = getBuildInfos(job); if (CollectionUtils.isEmpty(buildInfos)) { return null; } for (BuildInfo buildInfo : buildInfos) { if (buildInfo.getBuildNo() == buildNumber) { return buildInfo; } } return null; } private boolean deleteDir(File dir) { if (dir.isDirectory()) { String[] children = dir.list(); for (int i = 0; i < children.length; i++) { boolean success = deleteDir(new File(dir, children[i])); if (!success) { return false; } } } // The directory is now empty so delete it return dir.delete(); } }