Java tutorial
package fr.ortolang.diffusion.runtime.engine.task; /* * #%L * ORTOLANG * A online network structure for hosting language resources and tools. * * Jean-Marie Pierrel / ATILF UMR 7118 - CNRS / Universit de Lorraine * Etienne Petitjean / ATILF UMR 7118 - CNRS * Jrme Blanchard / ATILF UMR 7118 - CNRS * Bertrand Gaiffe / ATILF UMR 7118 - CNRS * Cyril Pestel / ATILF UMR 7118 - CNRS * Marie Tonnelier / ATILF UMR 7118 - CNRS * Ulrike Fleury / ATILF UMR 7118 - CNRS * Frdric Pierre / ATILF UMR 7118 - CNRS * Cline Moro / ATILF UMR 7118 - CNRS * * This work is based on work done in the equipex ORTOLANG (http://www.ortolang.fr/), by several Ortolang contributors (mainly CNRTL and SLDR) * ORTOLANG is funded by the French State program "Investissements d'Avenir" ANR-11-EQPX-0032 * %% * Copyright (C) 2013 - 2015 Ortolang Team * %% * This program is free software: you can redistribute it and/or modify * it under the terms of the GNU Lesser General Public License as * published by the Free Software Foundation, either version 3 of the * License, or (at your option) any later version. * * This program is distributed in the hope that it will be useful, * but WITHOUT ANY WARRANTY; without even the implied warranty of * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the * GNU General Lesser Public License for more details. * * You should have received a copy of the GNU General Lesser Public * License along with this program. If not, see * <http://www.gnu.org/licenses/lgpl-3.0.html>. * #L% */ import java.io.File; import java.io.IOException; import java.util.Arrays; import java.util.List; import java.util.logging.Level; import java.util.logging.Logger; import javax.transaction.Status; import org.activiti.engine.delegate.DelegateExecution; import com.fasterxml.jackson.core.JsonParser; import com.fasterxml.jackson.databind.ObjectMapper; import fr.ortolang.diffusion.membership.MembershipService; import fr.ortolang.diffusion.runtime.engine.RuntimeEngineEvent; import fr.ortolang.diffusion.runtime.engine.RuntimeEngineTask; import fr.ortolang.diffusion.runtime.engine.RuntimeEngineTaskException; import fr.ortolang.diffusion.store.handle.HandleStoreServiceException; public class ImportHandlesTask extends RuntimeEngineTask { private static final Logger LOGGER = Logger.getLogger(ImportHandlesTask.class.getName()); public static final String NAME = "Import Handles"; public ImportHandlesTask() { } @Override public void executeTask(DelegateExecution execution) throws RuntimeEngineTaskException { checkParameters(execution); String handlespath = execution.getVariable(HANDLES_PATH_PARAM_NAME, String.class); if (execution.getVariable(INITIER_PARAM_NAME, String.class) .equals(MembershipService.SUPERUSER_IDENTIFIER)) { ObjectMapper mapper = new ObjectMapper(); mapper.configure(JsonParser.Feature.ALLOW_SINGLE_QUOTES, true); try { if (getUserTransaction().getStatus() == Status.STATUS_NO_TRANSACTION) { LOGGER.log(Level.FINE, "starting new user transaction."); getUserTransaction().begin(); } } catch (Exception e) { LOGGER.log(Level.SEVERE, "unable to start new user transaction", e); } try { boolean needcommit; long tscommit = System.currentTimeMillis(); List<JsonHandle> handles = Arrays .asList(mapper.readValue(new File(handlespath), JsonHandle[].class)); LOGGER.log(Level.FINE, "- starting import handles"); boolean partial = false; StringBuilder report = new StringBuilder(); for (JsonHandle handle : handles) { needcommit = false; try { getHandleStore().recordHandle(handle.handle, handle.key, handle.url); } catch (HandleStoreServiceException e) { partial = true; report.append("unable to import handle [").append(handle.handle).append("] : ") .append(e.getMessage()).append("\r\n"); } if (System.currentTimeMillis() - tscommit > 30000) { LOGGER.log(Level.FINE, "current transaction exceed 30sec, need commit."); needcommit = true; } try { if (needcommit && getUserTransaction().getStatus() == Status.STATUS_ACTIVE) { LOGGER.log(Level.FINE, "committing active user transaction."); getUserTransaction().commit(); tscommit = System.currentTimeMillis(); getUserTransaction().begin(); } } catch (Exception e) { LOGGER.log(Level.SEVERE, "unable to commit active user transaction", e); } } if (partial) { throwRuntimeEngineEvent( RuntimeEngineEvent.createProcessLogEvent(execution.getProcessBusinessKey(), "Some handles has not been imported (see trace for detail)")); throwRuntimeEngineEvent(RuntimeEngineEvent .createProcessTraceEvent(execution.getProcessBusinessKey(), report.toString(), null)); } throwRuntimeEngineEvent(RuntimeEngineEvent.createProcessLogEvent(execution.getProcessBusinessKey(), "Import Handles done")); } catch (IOException e) { throw new RuntimeEngineTaskException("error parsing json file: " + e.getMessage()); } } else { throw new RuntimeEngineTaskException( "only " + MembershipService.SUPERUSER_IDENTIFIER + " can perform this task !!"); } } @Override public String getTaskName() { return NAME; } private void checkParameters(DelegateExecution execution) throws RuntimeEngineTaskException { if (!execution.hasVariable(HANDLES_PATH_PARAM_NAME)) { throw new RuntimeEngineTaskException("execution variable " + HANDLES_PATH_PARAM_NAME + " is not set"); } if (!execution.hasVariable(INITIER_PARAM_NAME)) { throw new RuntimeEngineTaskException("execution variable " + INITIER_PARAM_NAME + " is not set"); } } private static class JsonHandle { public String handle = ""; public String key = ""; public String url = ""; public JsonHandle() { } } }