/* 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 org.activiti.engine.impl.context;
import java.util.HashMap;
import java.util.HashSet;
import java.util.LinkedHashSet;
import java.util.List;
import java.util.Locale;
import java.util.Map;
import java.util.ResourceBundle;
import java.util.Stack;
import org.activiti.engine.impl.cfg.ProcessEngineConfigurationImpl;
import org.activiti.engine.impl.interceptor.CommandContext;
import org.activiti.engine.impl.jobexecutor.JobExecutorContext;
import org.activiti.engine.impl.persistence.deploy.ProcessDefinitionInfoCacheObject;
import org.activiti.engine.impl.pvm.runtime.InterpretableExecution;
import com.fasterxml.jackson.databind.node.ObjectNode;
/**
* @author Tom Baeyens
* @author Daniel Meyer
*/
public class Context {
protected static ThreadLocal<Stack<CommandContext>> commandContextThreadLocal = new ThreadLocal<Stack<CommandContext>>();
protected static ThreadLocal<Stack<ProcessEngineConfigurationImpl>> processEngineConfigurationStackThreadLocal = new ThreadLocal<Stack<ProcessEngineConfigurationImpl>>();
protected static ThreadLocal<Stack<ExecutionContext>> executionContextStackThreadLocal = new ThreadLocal<Stack<ExecutionContext>>();
protected static ThreadLocal<JobExecutorContext> jobExecutorContextThreadLocal = new ThreadLocal<JobExecutorContext>();
protected static ThreadLocal<Map<String, ObjectNode>> bpmnOverrideContextThreadLocal = new ThreadLocal<Map<String, ObjectNode>>();
protected static ResourceBundle.Control resourceBundleControl = new ResourceBundleControl();
public static CommandContext getCommandContext() {
Stack<CommandContext> stack = getStack(commandContextThreadLocal);
if (stack.isEmpty()) {
return null;
}
return stack.peek();
}
public static void setCommandContext(CommandContext commandContext) {
getStack(commandContextThreadLocal).push(commandContext);
}
public static void removeCommandContext() {
getStack(commandContextThreadLocal).pop();
}
public static ProcessEngineConfigurationImpl getProcessEngineConfiguration() {
Stack<ProcessEngineConfigurationImpl> stack = getStack(processEngineConfigurationStackThreadLocal);
if (stack.isEmpty()) {
return null;
}
return stack.peek();
}
public static void setProcessEngineConfiguration(ProcessEngineConfigurationImpl processEngineConfiguration) {
getStack(processEngineConfigurationStackThreadLocal).push(processEngineConfiguration);
}
public static void removeProcessEngineConfiguration() {
getStack(processEngineConfigurationStackThreadLocal).pop();
}
public static ExecutionContext getExecutionContext() {
return getStack(executionContextStackThreadLocal).peek();
}
public static boolean isExecutionContextActive() {
Stack<ExecutionContext> stack = executionContextStackThreadLocal.get();
return stack != null && !stack.isEmpty();
}
public static void setExecutionContext(InterpretableExecution execution) {
getStack(executionContextStackThreadLocal).push(new ExecutionContext(execution));
}
public static void removeExecutionContext() {
getStack(executionContextStackThreadLocal).pop();
}
protected static <T> Stack<T> getStack(ThreadLocal<Stack<T>> threadLocal) {
Stack<T> stack = threadLocal.get();
if (stack==null) {
stack = new Stack<T>();
threadLocal.set(stack);
}
return stack;
}
public static JobExecutorContext getJobExecutorContext() {
return jobExecutorContextThreadLocal.get();
}
public static void setJobExecutorContext(JobExecutorContext jobExecutorContext) {
jobExecutorContextThreadLocal.set(jobExecutorContext);
}
public static void removeJobExecutorContext() {
jobExecutorContextThreadLocal.remove();
}
public static ObjectNode getBpmnOverrideElementProperties(String id, String processDefinitionId) {
ObjectNode definitionInfoNode = getProcessDefinitionInfoNode(processDefinitionId);
ObjectNode elementProperties = null;
if (definitionInfoNode != null) {
elementProperties = getProcessEngineConfiguration().getDynamicBpmnService().getBpmnElementProperties(id, definitionInfoNode);
}
return elementProperties;
}
public static ObjectNode getLocalizationElementProperties(String language, String id, String processDefinitionId, boolean useFallback) {
ObjectNode definitionInfoNode = getProcessDefinitionInfoNode(processDefinitionId);
ObjectNode localizationProperties = null;
if (definitionInfoNode != null) {
if (useFallback == false) {
localizationProperties = getProcessEngineConfiguration().getDynamicBpmnService().getLocalizationElementProperties(
language, id, definitionInfoNode);
} else {
HashSet<Locale> candidateLocales = new LinkedHashSet<Locale>();
candidateLocales.addAll(resourceBundleControl.getCandidateLocales(id, new Locale(language)));
candidateLocales.addAll(resourceBundleControl.getCandidateLocales(id, Locale.getDefault()));
for (Locale locale : candidateLocales) {
localizationProperties = getProcessEngineConfiguration().getDynamicBpmnService().getLocalizationElementProperties(
locale.getLanguage(), id, definitionInfoNode);
if (localizationProperties != null) {
break;
}
}
}
}
return localizationProperties;
}
public static void removeBpmnOverrideContext() {
bpmnOverrideContextThreadLocal.remove();
}
protected static ObjectNode getProcessDefinitionInfoNode(String processDefinitionId) {
Map<String, ObjectNode> bpmnOverrideMap = getBpmnOverrideContext();
if (bpmnOverrideMap.containsKey(processDefinitionId) == false) {
ProcessDefinitionInfoCacheObject cacheObject = getProcessEngineConfiguration().getDeploymentManager()
.getProcessDefinitionInfoCache()
.get(processDefinitionId);
addBpmnOverrideElement(processDefinitionId, cacheObject.getInfoNode());
}
return getBpmnOverrideContext().get(processDefinitionId);
}
protected static Map<String, ObjectNode> getBpmnOverrideContext() {
Map<String, ObjectNode> bpmnOverrideMap = bpmnOverrideContextThreadLocal.get();
if (bpmnOverrideMap == null) {
bpmnOverrideMap = new HashMap<String, ObjectNode>();
}
return bpmnOverrideMap;
}
protected static void addBpmnOverrideElement(String id, ObjectNode infoNode) {
Map<String, ObjectNode> bpmnOverrideMap = bpmnOverrideContextThreadLocal.get();
if (bpmnOverrideMap == null) {
bpmnOverrideMap = new HashMap<String, ObjectNode>();
bpmnOverrideContextThreadLocal.set(bpmnOverrideMap);
}
bpmnOverrideMap.put(id, infoNode);
}
static class ResourceBundleControl extends ResourceBundle.Control {
@Override
public List<Locale> getCandidateLocales(String baseName, Locale locale) {
return super.getCandidateLocales(baseName, locale);
}
}
}