Add attachments using workflow api throwing error

Question

Hi,
I am getting the following error when i am trying to add attachments using worklist API.
     Missing class: invokeBPEL.MetaData
     Dependent class: com.evermind.io.ClassLoaderObjectInputStream
     Loader: oc4j:10.1.3
     Code-Source: /D:/product/10.1.3.1/OracleAS_1/j2ee/home/lib/oc4j-internal.jar
     Configuration: <code-source> in META-INF/boot.xml in D:\product\10.1.3.1\OracleAS_1\j2ee\home\oc4j.jar
This load was initiated at hw_services.root:0.0.0 using the Class.forName() method.
The missing class is not available from any code-source or loader in the system.
     at oracle.classloader.PolicyClassLoader.handleClassNotFound (PolicyClassLoader.java:2068) [D:/product/10.1.3.1/OracleAS_1/j2ee/home/lib/pcl.jar (from system property java.class.path), by sun.misc.Launcher$AppClassLoader@10469011]
     at oracle.classloader.PolicyClassLoader.internalLoadClass (PolicyClassLoader.java:1679) [D:/product/10.1.3.1/OracleAS_1/j2ee/home/lib/pcl.jar (from system property java.class.path), by sun.misc.Launcher$AppClassLoader@10469011]
     at oracle.classloader.PolicyClassLoader.loadClass (PolicyClassLoader.java:1635) [D:/product/10.1.3.1/OracleAS_1/j2ee/home/lib/pcl.jar (from system property java.class.path), by sun.misc.Launcher$AppClassLoader@10469011]
     at oracle.classloader.PolicyClassLoader.loadClass (PolicyClassLoader.java:1620) [D:/product/10.1.3.1/OracleAS_1/j2ee/home/lib/pcl.jar (from system property java.class.path), by sun.misc.Launcher$AppClassLoader@10469011]
     at java.lang.ClassLoader.loadClassInternal (ClassLoader.java:319) [jre bootstrap, by jre.bootstrap:1.5.0_06]
     at java.lang.Class.forName0 (Native method) [unknown, by unknown]
     at java.lang.Class.forName (Class.java:242) [jre bootstrap, by jre.bootstrap:1.5.0_06]
     at com.evermind.io.ClassLoaderObjectInputStream.resolveClass (ClassLoaderObjectInputStream.java:33) [D:/product/10.1.3.1/OracleAS_1/j2ee/home/lib/oc4j-internal.jar (from <code-source> in META-INF/boot.xml in D:\product\10.1.3.1\OracleAS_1\j2ee\home\oc4j.jar), by oc4j:10.1.3]
     at java.io.ObjectInputStream.readNonProxyDesc (ObjectInputStream.java:1538) [jre bootstrap, by jre.bootstrap:1.5.0_06]
     at java.io.ObjectInputStream.readClassDesc (ObjectInputStream.java:1460) [jre bootstrap, by jre.bootstrap:1.5.0_06]
     at java.io.ObjectInputStream.readOrdinaryObject (ObjectInputStream.java:1693) [jre bootstrap, by jre.bootstrap:1.5.0_06]
     at java.io.ObjectInputStream.readObject0 (ObjectInputStream.java:1299) [jre bootstrap, by jre.bootstrap:1.5.0_06]
     at java.io.ObjectInputStream.readObject (ObjectInputStream.java:339) [jre bootstrap, by jre.bootstrap:1.5.0_06]
     at com.evermind.server.rmi.RMIProtocol$Version.unmarshallParameterDirectly (RMIProtocol.java:402) [D:/product/10.1.3.1/OracleAS_1/j2ee/home/lib/oc4j-internal.jar (from <code-source> in META-INF/boot.xml in D:\product\10.1.3.1\OracleAS_1\j2ee\home\oc4j.jar), by oc4j:10.1.3]
     at com.evermind.server.rmi.RMIProtocol$Version_1_0.unmarshallParameter (RMIProtocol.java:471) [D:/product/10.1.3.1/OracleAS_1/j2ee/home/lib/oc4j-internal.jar (from <code-source> in META-INF/boot.xml in D:\product\10.1.3.1\OracleAS_1\j2ee\home\oc4j.jar), by oc4j:10.1.3]
     at com.evermind.server.rmi.RMIProtocol.readObject (RMIProtocol.java:80) [D:/product/10.1.3.1/OracleAS_1/j2ee/home/lib/oc4j-internal.jar (from <code-source> in META-INF/boot.xml in D:\product\10.1.3.1\OracleAS_1\j2ee\home\oc4j.jar), by oc4j:10.1.3]
     at com.evermind.server.rmi.RMIProtocol.readValue (RMIProtocol.java:161) [D:/product/10.1.3.1/OracleAS_1/j2ee/home/lib/oc4j-internal.jar (from <code-source> in META-INF/boot.xml in D:\product\10.1.3.1\OracleAS_1\j2ee\home\oc4j.jar), by oc4j:10.1.3]
     at com.evermind.server.rmi.ServerRmiMessageHandler.handleMethodInvocation (ServerRmiMessageHandler.java:514) [D:/product/10.1.3.1/OracleAS_1/j2ee/home/lib/oc4j-internal.jar (from <code-source> in META-INF/boot.xml in D:\product\10.1.3.1\OracleAS_1\j2ee\home\oc4j.jar), by oc4j:10.1.3]
     at com.evermind.server.rmi.ServerRmiMessageHandler.handleOrmiRequest (ServerRmiMessageHandler.java:272) [D:/product/10.1.3.1/OracleAS_1/j2ee/home/lib/oc4j-internal.jar (from <code-source> in META-INF/boot.xml in D:\product\10.1.3.1\OracleAS_1\j2ee\home\oc4j.jar), by oc4j:10.1.3]
     at com.evermind.server.rmi.ServerRmiMessageHandler.dispatchRequest (ServerRmiMessageHandler.java:241) [D:/product/10.1.3.1/OracleAS_1/j2ee/home/lib/oc4j-internal.jar (from <code-source> in META-INF/boot.xml in D:\product\10.1.3.1\OracleAS_1\j2ee\home\oc4j.jar), by oc4j:10.1.3]
     at com.evermind.server.rmi.RMIServerConnection.processReceivedCommand (RMIServerConnection.java:176) [D:/product/10.1.3.1/OracleAS_1/j2ee/home/lib/oc4j-internal.jar (from <code-source> in META-INF/boot.xml in D:\product\10.1.3.1\OracleAS_1\j2ee\home\oc4j.jar), by oc4j:10.1.3]
     at com.evermind.server.rmi.RMIConnection.handleCommand (RMIConnection.java:152) [D:/product/10.1.3.1/OracleAS_1/j2ee/home/lib/oc4j-internal.jar (from <code-source> in META-INF/boot.xml in D:\product\10.1.3.1\OracleAS_1\j2ee\home\oc4j.jar), by oc4j:10.1.3]
     at com.evermind.server.rmi.RMIConnection.listenForOrmiCommands (RMIConnection.java:127) [D:/product/10.1.3.1/OracleAS_1/j2ee/home/lib/oc4j-internal.jar (from <code-source> in META-INF/boot.xml in D:\product\10.1.3.1\OracleAS_1\j2ee\home\oc4j.jar), by oc4j:10.1.3]
     at com.evermind.server.rmi.RMIServerConnection.listenForOrmiCommands (RMIServerConnection.java:390) [D:/product/10.1.3.1/OracleAS_1/j2ee/home/lib/oc4j-internal.jar (from <code-source> in META-INF/boot.xml in D:\product\10.1.3.1\OracleAS_1\j2ee\home\oc4j.jar), by oc4j:10.1.3]
     at com.evermind.server.rmi.RMIConnection.run (RMIConnection.java:107) [D:/product/10.1.3.1/OracleAS_1/j2ee/home/lib/oc4j-internal.jar (from <code-source> in META-INF/boot.xml in D:\product\10.1.3.1\OracleAS_1\j2ee\home\oc4j.jar), by oc4j:10.1.3]
     at com.evermind.util.ReleasableResourcePooledExecutor$MyWorker.run (ReleasableResourcePooledExecutor.java:303) [D:/product/10.1.3.1/OracleAS_1/j2ee/home/lib/oc4j-internal.jar (from <code-source> in META-INF/boot.xml in D:\product\10.1.3.1\OracleAS_1\j2ee\home\oc4j.jar), by oc4j:10.1.3]
     at java.lang.Thread.run (Thread.java:595) [jre bootstrap, by jre.bootstrap:1.5.0_06]
Exception in thread "main"
This is the code i used
     String userId = "oc4jadmin";
     String password = "welcome1";
     String sTaskId = "";
     IWorkflowServiceClient wfSvcClient = WorkflowServiceClientFactory.getWorkflowServiceClient(WorkflowServiceClientFactory.REMOTE_CLIENT);
     System.out.println("Before getting TaskService");
     ITaskQueryService querySvc = wfSvcClient.getTaskQueryService();
     System.out.println("After getting TaskService");
     IWorkflowContext wfCtx = querySvc.authenticate(userId,password,"jazn.com",null);
     System.out.println("Last out");
     Predicate pred = new Predicate(TableConstants.WFTASK_STATE_COLUMN,Predicate.OP_EQ,IWorkflowConstants.TASK_STATE_ASSIGNED);
     List queryColumns = new ArrayList();
     queryColumns.add("TITLE");
     queryColumns.add("PRIORITY");
     queryColumns.add("STATE");
     queryColumns.add("TASKID");
     queryColumns.add("TASKNUMBER");
     List tasks = querySvc.queryTasks(wfCtx,
               queryColumns,
               null, //Do not query addtional info
               ITaskQueryService.ASSIGNMENT_FILTER_MY_AND_GROUP,
               null, //No keywords
               pred, //No custom predicate
               null, //No special ordering
               0, //Do not page the query result
               0);
     System.out.println("Task Size !!" +tasks.size());
     if (tasks != null)
     String[] taskList = new String[tasks.size()];
     for (int i=0; i< tasks.size(); i++)
     Task t = (Task)tasks.get(i);
     taskList[i] = t.getSystemAttributes().getTaskId();
     System.out.println("Found task: "+taskList);
     sTaskId = taskList[i];
     else
     System.out.println("Did not find any tasks");
     Task task = querySvc.getTaskDetailsById(wfCtx, sTaskId);
     //Add Attachments
     FileInputStream fs = new FileInputStream("D:/Test.txt");
     ITaskService itask = wfSvcClient.getTaskService();
     MetaData mdata = new MetaData();
     mdata.setMimeType("text/html");
     mdata.setContent("D:/Test.txt");
     mdata.setInputStream(fs);
     mdata.setName("Test Document");
     itask.addAttachment(wfCtx, sTaskId, mdata);
     if (task != null)
     System.out.println("Completing task: "+task.getTitle());
     wfSvcClient.getTaskService().updateTaskOutcome(wfCtx, task, "APPROVE");
Kindly let me know how to solve this issue.
Thanks,
Gomathi

Answer 1

hi,
Actually i have used AttachmentType..MetaData is the class which i created for implementing AttachmentType as it is Interface Class. Here is the code of MetaData class.
public class MetaData implements AttachmentType,java.io.Serializable{
     public String getBoundary() {
          // TODO Auto-generated method stub
          return null;
     public String getContent() {
          // TODO Auto-generated method stub
          return null;
     public InputStream getInputStream() {
          // TODO Auto-generated method stub
          return null;
     public String getMimeType() {
          // TODO Auto-generated method stub
          return null;
     public String getName() {
          // TODO Auto-generated method stub
          return null;
     public String getSystemVersionFlag() {
          // TODO Auto-generated method stub
          return null;
     public String getTaskId() {
          // TODO Auto-generated method stub
          return null;
     public String getURI() {
          // TODO Auto-generated method stub
          return null;
     public String getUpdatedBy() {
          // TODO Auto-generated method stub
          return null;
     public int getVersion() {
          // TODO Auto-generated method stub
          return 0;
     public void setBoundary(String arg0) {
          // TODO Auto-generated method stub
     public void setContent(String arg0) {
          String cont = null;
          cont = arg0;
     public void setInputStream(InputStream arg0) {
          InputStream sStream = null;
          sStream = arg0;
     public void setMimeType(String arg0) {
          String mime = null;
          mime = arg0;
     public void setName(String arg0) {
          String sname = null;
          sname = arg0;
     public void setSystemVersionFlag(String arg0) {
          // TODO Auto-generated method stub
     public void setTaskId(String arg0) {
          // TODO Auto-generated method stub
     public void setURI(String arg0) {
          // TODO Auto-generated method stub
     public void setUpdatedBy(String arg0) {
          // TODO Auto-generated method stub
     public void setVersion(int arg0) {
          // TODO Auto-generated method stub
kindly tell me how can i solve this issue.
Thanks,
Gomathi
Edited by: user647559 on Sep 23, 2008 10:05 PM