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WebServiceWorkItemHandler.java
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WebServiceWorkItemHandler.java
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/*
* Copyright 2019 Red Hat, Inc. and/or its affiliates.
*
* 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.jbpm.process.workitem.webservice;
import java.io.File;
import java.lang.reflect.Array;
import java.lang.reflect.Field;
import java.lang.reflect.Method;
import java.net.MalformedURLException;
import java.net.URL;
import java.net.URLClassLoader;
import java.util.Collection;
import java.util.HashMap;
import java.util.HashSet;
import java.util.List;
import java.util.Map;
import java.util.concurrent.ConcurrentHashMap;
import java.util.concurrent.TimeUnit;
import java.util.stream.Collectors;
import javax.xml.namespace.QName;
import org.apache.cxf.configuration.security.AuthorizationPolicy;
import org.apache.cxf.endpoint.Client;
import org.apache.cxf.endpoint.ClientCallback;
import org.apache.cxf.endpoint.Endpoint;
import org.apache.cxf.endpoint.dynamic.DynamicClientFactory;
import org.apache.cxf.headers.Header;
import org.apache.cxf.jaxb.JAXBDataBinding;
import org.apache.cxf.jaxws.endpoint.dynamic.JaxWsDynamicClientFactory;
import org.apache.cxf.jaxws.interceptors.HolderInInterceptor;
import org.apache.cxf.jaxws.interceptors.WrapperClassInInterceptor;
import org.apache.cxf.message.Message;
import org.apache.cxf.transport.http.HTTPConduit;
import org.apache.cxf.transports.http.configuration.HTTPClientPolicy;
import org.drools.core.process.instance.impl.WorkItemImpl;
import org.jbpm.bpmn2.core.Bpmn2Import;
import org.jbpm.bpmn2.handler.WorkItemHandlerRuntimeException;
import org.jbpm.process.workitem.core.AbstractLogOrThrowWorkItemHandler;
import org.jbpm.process.workitem.core.util.Wid;
import org.jbpm.process.workitem.core.util.WidMavenDepends;
import org.jbpm.process.workitem.core.util.WidParameter;
import org.jbpm.process.workitem.core.util.WidResult;
import org.jbpm.process.workitem.core.util.WorkItemHeaderInfo;
import org.jbpm.process.workitem.core.util.WorkItemHeaderUtils;
import org.jbpm.process.workitem.core.util.service.WidAction;
import org.jbpm.process.workitem.core.util.service.WidAuth;
import org.jbpm.process.workitem.core.util.service.WidService;
import org.jbpm.workflow.core.impl.WorkflowProcessImpl;
import org.kie.api.runtime.KieSession;
import org.kie.api.runtime.manager.RuntimeEngine;
import org.kie.api.runtime.manager.RuntimeManager;
import org.kie.api.runtime.process.WorkItem;
import org.kie.api.runtime.process.WorkItemManager;
import org.kie.internal.runtime.Cacheable;
import org.kie.internal.runtime.manager.RuntimeManagerRegistry;
import org.kie.internal.runtime.manager.context.ProcessInstanceIdContext;
import org.slf4j.Logger;
import org.slf4j.LoggerFactory;
/**
* Web Service Work Item Handler that performs a WebService call.
*/
@Wid(widfile = "WebServiceDefinitions.wid", name = "WebService",
displayName = "WebService",
defaultHandler = "mvel: new org.jbpm.process.workitem.webservice.WebServiceWorkItemHandler()",
documentation = "${artifactId}/index.html",
category = "${artifactId}",
icon = "defaultwebserviceicon.png",
parameters = {
@WidParameter(name = "Url"),
@WidParameter(name = "Namespace"),
@WidParameter(name = "Interface"),
@WidParameter(name = "Operation"),
@WidParameter(name = "Endpoint"),
@WidParameter(name = "Parameter"),
@WidParameter(name = "Mode"),
@WidParameter(name = "Wrapped")
},
results = {
@WidResult(name = "Result", runtimeType = "java.lang.Object")
},
mavenDepends = {
@WidMavenDepends(group = "${groupId}", artifact = "${artifactId}", version = "${version}")
},
serviceInfo = @WidService(category = "${name}", description = "${description}",
keywords = "webservice,call",
action = @WidAction(title = "Perform a WebService call"),
authinfo = @WidAuth
))
public class WebServiceWorkItemHandler extends AbstractLogOrThrowWorkItemHandler implements Cacheable {
public static final String WSDL_IMPORT_TYPE = "http://schemas.xmlsoap.org/wsdl/";
private static Logger logger = LoggerFactory.getLogger(WebServiceWorkItemHandler.class);
private final Long defaultJbpmCxfClientConnectionTimeout = Long.parseLong(System.getProperty("org.jbpm.cxf.client.connectionTimeout", "30000"));
private final Long defaultJbpmCxfClientReceiveTimeout = Long.parseLong(System.getProperty("org.jbpm.cxf.client.receiveTimeout", "60000"));
private ConcurrentHashMap<String, Client> clients = new ConcurrentHashMap<>();
private DynamicClientFactory dcf = null;
private KieSession ksession;
private int asyncTimeout = 10;
private ClassLoader classLoader;
private String username;
private String password;
enum WSMode {
SYNC,
ASYNC,
ONEWAY;
}
/**
* Default constructor - no authentication nor ksession
*/
public WebServiceWorkItemHandler() {
this.ksession = null;
this.username = null;
this.password = null;
}
/**
* Used when no authentication is required
* @param ksession - kie session
*/
public WebServiceWorkItemHandler(KieSession ksession) {
this(ksession, null, null);
}
/**
* Dedicated constructor when BASIC authentication method shall be used
* @param kieSession - kie session
* @param username - basic auth username
* @param password - basic auth password
*/
public WebServiceWorkItemHandler(KieSession kieSession,
String username,
String password) {
this.ksession = kieSession;
this.username = username;
this.password = password;
}
/**
* Used when no authentication is required
* @param ksession - kie session
* @param classloader - classloader to use
*/
public WebServiceWorkItemHandler(KieSession ksession,
ClassLoader classloader) {
this(ksession, classloader, null, null);
}
/**
* Dedicated constructor when BASIC authentication method shall be used
* @param ksession - kie session
* @param classloader - classloader to use
* @param username - basic auth username
* @param password - basic auth password
*/
public WebServiceWorkItemHandler(KieSession ksession,
ClassLoader classloader,
String username,
String password) {
this.ksession = ksession;
this.classLoader = classloader;
this.username = username;
this.password = password;
}
/**
* Used when no authentication is required
* @param ksession - kie session
* @param timeout - connection timeout
*/
public WebServiceWorkItemHandler(KieSession ksession,
int timeout) {
this(ksession, timeout, null, null);
}
/**
* Dedicated constructor when BASIC authentication method shall be used
* @param ksession - kie session
* @param timeout - connection timeout
* @param username - basic auth username
* @param password - basic auth password
*/
public WebServiceWorkItemHandler(KieSession ksession,
int timeout,
String username,
String password) {
this.ksession = ksession;
this.asyncTimeout = timeout;
this.username = username;
this.password = password;
}
/**
* Used when no authentication is required
* @param handlingProcessId - process id to handle exception
* @param handlingStrategy - strategy to be applied after handling exception process is completed
* @param ksession - kie session
*/
public WebServiceWorkItemHandler(String handlingProcessId,
String handlingStrategy,
KieSession ksession) {
this(ksession, null, null);
this.handlingProcessId = handlingProcessId;
this.handlingStrategy = handlingStrategy;
}
/**
* Dedicated constructor when BASIC authentication method shall be used
* @param handlingProcessId - process id to handle exception
* @param handlingStrategy - strategy to be applied after handling exception process is completed
* @param kieSession - kie session
* @param username - basic auth username
* @param password - basic auth password
*/
public WebServiceWorkItemHandler(String handlingProcessId,
String handlingStrategy,
KieSession kieSession,
String username,
String password) {
this.ksession = kieSession;
this.username = username;
this.password = password;
this.handlingProcessId = handlingProcessId;
this.handlingStrategy = handlingStrategy;
}
/**
* Used when no authentication is required
* @param handlingProcessId - process id to handle exception
* @param handlingStrategy - strategy to be applied after handling exception process is completed
* @param ksession - kie session
* @param classloader - classloader to use
*/
public WebServiceWorkItemHandler(String handlingProcessId,
String handlingStrategy,
KieSession ksession,
ClassLoader classloader) {
this(ksession, classloader, null, null);
this.handlingProcessId = handlingProcessId;
this.handlingStrategy = handlingStrategy;
}
/**
* Dedicated constructor when BASIC authentication method shall be used
* @param handlingProcessId - process id to handle exception
* @param handlingStrategy - strategy to be applied after handling exception process is completed
* @param ksession - kie session
* @param classloader - classloader to use
* @param username - basic auth username
* @param password - basic auth password
*/
public WebServiceWorkItemHandler(String handlingProcessId,
String handlingStrategy,
KieSession ksession,
ClassLoader classloader,
String username,
String password) {
this.ksession = ksession;
this.classLoader = classloader;
this.username = username;
this.password = password;
this.handlingProcessId = handlingProcessId;
this.handlingStrategy = handlingStrategy;
}
/**
* Used when no authentication is required
* @param handlingProcessId - process id to handle exception
* @param handlingStrategy - strategy to be applied after handling exception process is completed
* @param ksession - kie session
* @param timeout - connection timeout
*/
public WebServiceWorkItemHandler(String handlingProcessId,
String handlingStrategy,
KieSession ksession,
int timeout) {
this(ksession, timeout, null, null);
this.handlingProcessId = handlingProcessId;
this.handlingStrategy = handlingStrategy;
}
/**
* Dedicated constructor when BASIC authentication method shall be used
* @param handlingProcessId - process id to handle exception
* @param handlingStrategy - strategy to be applied after handling exception process is completed
* @param ksession - kie session
* @param timeout - connection timeout
* @param username - basic auth username
* @param password - basic auth password
*/
public WebServiceWorkItemHandler(String handlingProcessId,
String handlingStrategy,
KieSession ksession,
int timeout,
String username,
String password) {
this.ksession = ksession;
this.asyncTimeout = timeout;
this.username = username;
this.password = password;
this.handlingProcessId = handlingProcessId;
this.handlingStrategy = handlingStrategy;
}
@Override
public void executeWorkItem(WorkItem workItem,
final WorkItemManager manager) {
// since JaxWsDynamicClientFactory will change the TCCL we need to restore it after creating client
ClassLoader origClassloader = Thread.currentThread().getContextClassLoader();
Object[] parameters = null;
String interfaceRef = (String) workItem.getParameter("Interface");
String operationRef = (String) workItem.getParameter("Operation");
String endpointAddress = (String) workItem.getParameter("Endpoint");
if (workItem.getParameter("Parameter") instanceof Object[]) {
parameters = (Object[]) workItem.getParameter("Parameter");
} else if (workItem.getParameter("Parameter") != null && workItem.getParameter("Parameter").getClass().isArray()) {
int length = Array.getLength(workItem.getParameter("Parameter"));
parameters = new Object[length];
for (int i = 0; i < length; i++) {
parameters[i] = Array.get(workItem.getParameter("Parameter"),
i);
}
} else {
parameters = new Object[]{workItem.getParameter("Parameter")};
}
String modeParam = (String) workItem.getParameter("Mode");
WSMode mode = WSMode.valueOf(modeParam == null ? "SYNC" : modeParam.toUpperCase());
Boolean wrapped = Boolean.parseBoolean((String) workItem.getParameter("Wrapped"));
try {
Client client = getWSClient(workItem,
interfaceRef);
if (client == null) {
throw new IllegalStateException("Unable to create client for web service " + interfaceRef + " - " + operationRef);
}
//Override endpoint address if configured.
if (endpointAddress != null && !"".equals(endpointAddress)) {
client.getRequestContext().put(Message.ENDPOINT_ADDRESS,
endpointAddress);
}
// apply authorization if needed
applyAuthorization(username, password, client);
//Remove interceptors if using wrapped mode
if (wrapped) {
removeWrappingInterceptors(client);
}
switch (mode) {
case SYNC:
Object[] result = wrapped ? client.invokeWrapped(operationRef, parameters) : client.invoke(operationRef, parameters);
Map<String, Object> output = new HashMap<String, Object>();
if (result == null || result.length == 0) {
output.put("Result",
null);
} else {
output.put("Result",
result[0]);
}
logger.debug("Received sync response {} completeing work item {}",
result,
workItem.getId());
manager.completeWorkItem(workItem.getId(),
output);
break;
case ASYNC:
final ClientCallback callback = new ClientCallback();
final long workItemId = workItem.getId();
final String deploymentId = nonNull(((WorkItemImpl) workItem).getDeploymentId());
final long processInstanceId = workItem.getProcessInstanceId();
if (wrapped) {
client.invokeWrapped(callback, operationRef, parameters);
} else {
client.invoke(callback, operationRef, parameters);
}
new Thread(new Runnable() {
@Override
public void run() {
try {
Object[] result = callback.get(asyncTimeout,
TimeUnit.SECONDS);
Map<String, Object> output = new HashMap<String, Object>();
if (callback.isDone()) {
if (result == null) {
output.put("Result",
null);
} else {
output.put("Result",
result[0]);
}
}
logger.debug("Received async response {} completeing work item {}",
result,
workItemId);
RuntimeManager manager = RuntimeManagerRegistry.get().getManager(deploymentId);
if (manager != null) {
RuntimeEngine engine = manager.getRuntimeEngine(ProcessInstanceIdContext.get(processInstanceId));
engine.getKieSession().getWorkItemManager().completeWorkItem(workItemId,
output);
manager.disposeRuntimeEngine(engine);
} else {
// in case there is no RuntimeManager available use available ksession,
// as it might be used without runtime manager at all
ksession.getWorkItemManager().completeWorkItem(workItemId,
output);
}
} catch (Exception e) {
e.printStackTrace();
throw new RuntimeException("Error encountered while invoking ws operation asynchronously",
e);
}
}
}).start();
break;
case ONEWAY:
ClientCallback callbackFF = new ClientCallback();
if (wrapped) {
client.invokeWrapped(callbackFF, operationRef, parameters);
} else {
client.invoke(callbackFF, operationRef, parameters);
}
logger.debug("One way operation, not going to wait for response, completing work item {}",
workItem.getId());
manager.completeWorkItem(workItem.getId(),
new HashMap<String, Object>());
break;
default:
break;
}
} catch (Exception e) {
handleException(e);
} finally {
Thread.currentThread().setContextClassLoader(origClassloader);
}
}
private void removeWrappingInterceptors(Client client){
Endpoint endpoint = client.getEndpoint();
endpoint.getInInterceptors().stream().filter(i -> i instanceof WrapperClassInInterceptor).findFirst().ifPresent(i -> {
endpoint.getInInterceptors().remove(i);
});
endpoint.getInInterceptors().stream().filter(i -> i instanceof HolderInInterceptor).findFirst().ifPresent(i -> {
endpoint.getInInterceptors().remove(i);
});
}
@SuppressWarnings("unchecked")
protected Client getWSClient(WorkItem workItem, String interfaceRef) {
if (clients.containsKey(interfaceRef)) {
return clients.get(interfaceRef);
}
synchronized (this) {
if (clients.containsKey(interfaceRef)) {
return clients.get(interfaceRef);
}
String importLocation = (String) workItem.getParameter("Url");
String importNamespace = (String) workItem.getParameter("Namespace");
if (importLocation != null && importLocation.trim().length() > 0
&& importNamespace != null && importNamespace.trim().length() > 0) {
return getClient (workItem, importLocation, importNamespace, interfaceRef);
}
long processInstanceId = ((WorkItemImpl) workItem).getProcessInstanceId();
WorkflowProcessImpl process = ((WorkflowProcessImpl) ksession.getProcessInstance(processInstanceId).getProcess());
List<Bpmn2Import> typedImports = (List<Bpmn2Import>) process.getMetaData("Bpmn2Imports");
if (typedImports != null) {
Client client = null;
for (Bpmn2Import importObj : typedImports) {
if (WSDL_IMPORT_TYPE.equalsIgnoreCase(importObj.getType())) {
try {
return getClient (workItem, importObj.getLocation(), importObj.getNamespace(), interfaceRef);
} catch (Exception e) {
logger.error("Error when creating WS Client", e);
}
}
}
}
}
return null;
}
private Client getClient(WorkItem workItem, String location, String namespace, String interfaceRef) {
Client client = getDynamicClientFactory().createClient(location, new QName(namespace, interfaceRef),
getInternalClassLoader(), null);
setClientTimeout(workItem, client);
Collection<WorkItemHeaderInfo> headers = WorkItemHeaderUtils.getHeaderInfo(workItem);
if (!headers.isEmpty()) {
client.getRequestContext().put(Header.HEADER_LIST,
headers.stream().map(this::buildHeader).collect(Collectors.toList()));
}
clients.put(interfaceRef, client);
return client;
}
private Header buildHeader(WorkItemHeaderInfo header) {
String namespace = (String) header.getParam("NS");
QName name = namespace == null ? new QName(header.getName()) : new QName(namespace, header.getName());
Class<?> contentClass = String.class;
String type = (String) header.getParam("TYPE");
if (type != null) {
try {
contentClass = classLoader.loadClass(type);
} catch (ClassNotFoundException ex) {
logger.warn("Cannot find type {}", type, ex);
}
}
JAXBDataBinding binding = null;
try {
binding = new JAXBDataBinding(contentClass);
} catch (Exception ex) {
logger.warn("Error creating binding for type {}", type, ex);
}
return new Header(name, header.getContent(), binding);
}
private void setClientTimeout(WorkItem workItem, Client client) {
HTTPConduit conduit = (HTTPConduit) client.getConduit();
HTTPClientPolicy policy = conduit.getClient();
long connectionTimeout = defaultJbpmCxfClientConnectionTimeout;
String connectionTimeoutStr = (String) workItem.getParameter("ConnectionTimeout");
if (connectionTimeoutStr != null && !connectionTimeoutStr.trim().isEmpty()) {
connectionTimeout = Long.valueOf(connectionTimeoutStr);
}
long receiveTimeout = defaultJbpmCxfClientReceiveTimeout;
String receiveTimeoutStr = (String) workItem.getParameter("ReceiveTimeout");
if (receiveTimeoutStr != null && !receiveTimeoutStr.trim().isEmpty()) {
receiveTimeout = Long.valueOf(receiveTimeoutStr);
}
logger.debug("connectionTimeout = {}, receiveTimeout = {}", connectionTimeout, receiveTimeout);
policy.setConnectionTimeout(connectionTimeout);
policy.setReceiveTimeout(receiveTimeout);
}
protected synchronized DynamicClientFactory getDynamicClientFactory() {
if (this.dcf == null) {
this.dcf = JaxWsDynamicClientFactory.newInstance();
}
return this.dcf;
}
@Override
public void abortWorkItem(WorkItem workItem,
WorkItemManager manager) {
// Do nothing, cannot be aborted
}
/* CXF builds compiler classpath assuming that the hierarchy of ClassLoader is composed of URLClassLoader instances.
* Since ModuleClassLoader does not implement URLClassLoader, we need to provide an alternative way of retrieving these URLS
* so CXF can build a proper classpath, avoiding the issue mentioned below.
* @see https://issues.apache.org/jira/browse/CXF-7925
*/
@SuppressWarnings("squid:S1872")
private ClassLoader getInternalClassLoader() {
ClassLoader cl = this.classLoader != null ? classLoader : Thread.currentThread().getContextClassLoader(), parent = cl;
Collection<URL> uris = new HashSet<>();
do {
if (parent.getClass().getSimpleName().equals("ModuleClassLoader")) {
try {
getJarsFromModuleClassLoader(parent, uris);
} catch (ReflectiveOperationException | MalformedURLException e) {
throw new WorkItemHandlerRuntimeException(e, "Problem calculating list of URLs from ModuleClassLoader");
}
}
parent = parent.getParent();
} while (parent != null);
if (!uris.isEmpty()) {
cl = new CXFJavaCompileClassLoader(uris, cl);
}
return cl;
}
private static class CXFJavaCompileClassLoader extends URLClassLoader {
private URL[] jarUrls;
public CXFJavaCompileClassLoader(Collection<URL> files, ClassLoader parent) {
super(new URL[0], parent);
logger.trace("Loaded urls are {}", files);
this.jarUrls = files.toArray(new URL[0]);
}
@Override
public URL[] getURLs() {
return jarUrls;
}
}
/* This method uses public methods of ModuleClassLoader through introspection in order to avoid a compile time
* dependency with jboss module classes.
*/
private void getJarsFromModuleClassLoader(ClassLoader cl,
Collection<URL> collector) throws ReflectiveOperationException, MalformedURLException {
Object resourceLoaders = methodInvoke(cl, "getResourceLoaders", Object.class);
for (int i = 0; i < Array.getLength(resourceLoaders); i++) {
Object resourceLoader = Array.get(resourceLoaders, i);
switch (resourceLoader.getClass().getSimpleName()) {
case "JarFileResourceLoader":
collector.add(fieldGet(resourceLoader, "rootUrl", URL.class));
break;
case "VFSResourceLoader":
String rootName = fieldGet(resourceLoader, "rootName", String.class);
if (rootName.endsWith("jar")) {
collector.add(new File(methodInvoke(fieldGet(resourceLoader, "root", Object.class),
"getPhysicalFile", File.class).getParentFile(), rootName).toURI().toURL());
}
break;
default:
// ignore other resources
}
}
}
@SuppressWarnings("squid:S3011")
private <T> T methodInvoke(Object obj,
String methodName,
Class<T> resultClass) throws ReflectiveOperationException {
Method m = obj.getClass().getDeclaredMethod(methodName);
m.setAccessible(true);
return resultClass.cast(m.invoke(obj));
}
@SuppressWarnings("squid:S3011")
private <T> T fieldGet(Object obj,
String fieldName,
Class<T> resultClass) throws ReflectiveOperationException {
Field f = obj.getClass().getDeclaredField(fieldName);
f.setAccessible(true);
return resultClass.cast(f.get(obj));
}
public ClassLoader getClassLoader() {
return classLoader;
}
public void setClassLoader(ClassLoader classLoader) {
this.classLoader = classLoader;
}
protected String nonNull(String value) {
if (value == null) {
return "";
}
return value;
}
@Override
public void close() {
if (clients != null) {
for (Client client : clients.values()) {
client.destroy();
}
}
}
protected void applyAuthorization(String userName, String password, Client client) {
if(userName != null && password != null) {
HTTPConduit httpConduit = (HTTPConduit) client.getConduit();
AuthorizationPolicy authorizationPolicy = new AuthorizationPolicy();
authorizationPolicy.setUserName(userName);
authorizationPolicy.setPassword(password);
authorizationPolicy.setAuthorizationType("Basic");
httpConduit.setAuthorization(authorizationPolicy);
} else {
logger.warn("UserName and Password must be provided to set the authorization policy.");
}
}
public void setClients(ConcurrentHashMap<String, Client> clients) {
this.clients = clients;
}
}