| /* |
| * Licensed to the Apache Software Foundation (ASF) under one |
| * or more contributor license agreements. See the NOTICE file |
| * distributed with this work for additional information |
| * regarding copyright ownership. The ASF licenses this file |
| * to you 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 org.apache.ode.bpel.engine.migration; |
| |
| import org.apache.ode.bpel.engine.BpelProcess; |
| import org.apache.ode.bpel.engine.OutstandingRequestManager; |
| import org.apache.ode.bpel.engine.ReplacementMapImpl; |
| import org.apache.ode.bpel.dao.BpelDAOConnection; |
| import org.apache.ode.bpel.dao.ProcessInstanceDAO; |
| import org.apache.ode.bpel.dao.ProcessDAO; |
| import org.apache.ode.bpel.runtime.Selector; |
| import org.apache.ode.bpel.common.CorrelationKey; |
| import org.apache.ode.bpel.common.CorrelationKeySet; |
| import org.apache.ode.bpel.obj.OProcess; |
| import org.apache.ode.jacob.vpu.ExecutionQueueImpl; |
| import org.apache.commons.logging.Log; |
| import org.apache.commons.logging.LogFactory; |
| |
| import javax.xml.namespace.QName; |
| import java.util.Set; |
| import java.util.Collection; |
| import java.util.concurrent.ConcurrentHashMap; |
| import java.io.ObjectStreamClass; |
| import java.io.ByteArrayInputStream; |
| import java.io.ByteArrayOutputStream; |
| |
| /** |
| * Migrates the database from using single correlations to multiple correlations support. |
| */ |
| public class CorrelationKeySetMigration implements Migration { |
| private static final Log __log = LogFactory.getLog(CorrelationKeySetMigration.class); |
| |
| public boolean migrate(Set<BpelProcess> registeredProcesses, BpelDAOConnection connection) { |
| boolean v1First = true; |
| for (BpelProcess process : registeredProcesses) { |
| ProcessDAO processDao = connection.getProcess(process.getConf().getProcessId()); |
| Collection<ProcessInstanceDAO> pis = processDao.getActiveInstances(); |
| |
| // Migrate the correlation key stored in the jacob state of the instance |
| for (ProcessInstanceDAO instance : pis) { |
| __log.debug("Migrating correlation key in jacob for instance " + instance.getInstanceId()); |
| OProcess oproc = findOProcess(registeredProcesses, instance.getProcess().getProcessId()); |
| if (v1First) { |
| if (!updateV1Key(instance, oproc)) { |
| v1First = false; |
| updateV2Key(instance, oproc); |
| } |
| } else { |
| if (!updateV2Key(instance, oproc)) { |
| v1First = true; |
| updateV1Key(instance, oproc); |
| } |
| } |
| } |
| } |
| |
| return true; |
| } |
| |
| private boolean updateV1Key(ProcessInstanceDAO instance, OProcess oproc) { |
| ExecutionQueueImpl soup; |
| try { |
| soup = readOldState(instance, oproc, getClass().getClassLoader(), true); |
| if (soup == null) return false; |
| } catch (Exception e) { |
| __log.debug(" failed to read a v1 state for instance " + instance.getInstanceId()); |
| ExecutionQueueImpl._classDescriptors.clear(); |
| return false; |
| } |
| try { |
| OutstandingRequestManager orm = (OutstandingRequestManager) soup.getGlobalData(); |
| for (OutstandingRequestManager.Entry entry : orm._byChannel.values()) { |
| Selector[] newSelectors = new Selector[entry.selectors.length]; |
| int index = 0; |
| for (Object selector : entry.selectors) { |
| OldSelector sel = (OldSelector)selector; |
| Object selCKey = sel.correlationKey; |
| if (selCKey != null) { |
| OldCorrelationKey old = (OldCorrelationKey) selCKey; |
| __log.debug(" Changing V1 key " + old.toCanonicalString()); |
| |
| CorrelationKeySet newKeySet = new CorrelationKeySet(); |
| newKeySet.add(new CorrelationKey(""+old.getCSetId(), old.getValues())); |
| Selector newSelector = new Selector(sel.idx, sel.plinkInstance, sel.opName, |
| sel.oneWay, sel.messageExchangeId, newKeySet, "one"); |
| newSelector.correlationKey = new CorrelationKey(""+old.getCSetId(), old.getValues()); |
| newSelectors[index++] = newSelector; |
| } |
| } |
| entry.selectors = newSelectors; |
| } |
| |
| writeOldState(instance, soup); |
| } finally { |
| ExecutionQueueImpl._classDescriptors.clear(); |
| } |
| return true; |
| } |
| |
| private boolean updateV2Key(ProcessInstanceDAO instance, OProcess oproc) { |
| ExecutionQueueImpl soup; |
| try { |
| soup = readOldState(instance, oproc, getClass().getClassLoader(), false); |
| if (soup == null) return false; |
| } catch (Exception e) { |
| __log.debug(" failed to read a v2 state for instance " + instance.getInstanceId()); |
| ExecutionQueueImpl._classDescriptors.clear(); |
| return false; |
| } |
| OutstandingRequestManager orm = (OutstandingRequestManager) soup.getGlobalData(); |
| for (OutstandingRequestManager.Entry entry : orm._byChannel.values()) { |
| Selector[] newSelectors = new Selector[entry.selectors.length]; |
| int index = 0; |
| for (Object selector : entry.selectors) { |
| OldSelector sel = (OldSelector)selector; |
| CorrelationKey selCKey = (CorrelationKey) sel.correlationKey; |
| if (selCKey != null) { |
| __log.debug(" Changing V2 key " + selCKey.toCanonicalString()); |
| |
| CorrelationKeySet newKeySet = new CorrelationKeySet(); |
| newKeySet.add(new CorrelationKey(""+selCKey.getCorrelationSetName(), selCKey.getValues())); |
| Selector newSelector = new Selector(sel.idx, sel.plinkInstance, sel.opName, |
| sel.oneWay, sel.messageExchangeId, newKeySet, "one"); |
| newSelector.correlationKey = new CorrelationKey(""+selCKey.getCorrelationSetName(), selCKey.getValues()); |
| newSelectors[index++] = newSelector; |
| } |
| } |
| entry.selectors = newSelectors; |
| } |
| |
| writeOldState(instance, soup); |
| return true; |
| } |
| |
| private ExecutionQueueImpl readOldState(ProcessInstanceDAO instance, OProcess oprocess, |
| ClassLoader cl, boolean changeKey) { |
| if (instance.getExecutionState() == null) return null; |
| try { |
| ExecutionQueueImpl soup = new ExecutionQueueImpl(cl); |
| ObjectStreamClass osc; |
| if (changeKey) { |
| osc = ObjectStreamClass.lookup(Class.forName( |
| "org.apache.ode.bpel.engine.migration.OldCorrelationKey", true, cl)); |
| ExecutionQueueImpl._classDescriptors.put("org.apache.ode.bpel.common.CorrelationKey", osc); |
| } |
| osc = ObjectStreamClass.lookup(Class.forName( |
| "org.apache.ode.bpel.engine.migration.OldSelector", true, cl)); |
| ExecutionQueueImpl._classDescriptors.put("org.apache.ode.bpel.runtime.Selector", osc); |
| osc = ObjectStreamClass.lookup(Class.forName( |
| "[Lorg.apache.ode.bpel.engine.migration.OldSelector;", true, getClass().getClassLoader())); |
| ExecutionQueueImpl._classDescriptors.put("[Lorg.apache.ode.bpel.runtime.Selector;", osc); |
| |
| soup.setReplacementMap(new ReplacementMapImpl(oprocess)); |
| ByteArrayInputStream iis = new ByteArrayInputStream(instance.getExecutionState()); |
| soup.read(iis); |
| return soup; |
| } catch (Exception e) { |
| throw new RuntimeException(e); |
| } |
| } |
| |
| private void writeOldState(ProcessInstanceDAO instance, ExecutionQueueImpl soup) { |
| try { |
| ByteArrayOutputStream bos = new ByteArrayOutputStream(); |
| soup.write(bos); |
| bos.close(); |
| instance.setExecutionState(bos.toByteArray()); |
| ExecutionQueueImpl._classDescriptors.clear(); |
| } catch (Exception e) { |
| throw new RuntimeException(e); |
| } |
| } |
| |
| private OProcess findOProcess(Set<BpelProcess> registeredProcesses, QName name) { |
| for (BpelProcess process : registeredProcesses) { |
| if (process.getConf().getProcessId().equals(name)) return process.getOProcess(); |
| } |
| return null; |
| } |
| |
| } |