RE: BackGroundTask is not working

Raghu teja, modified 7 Years ago.

Junior Member Posts: 61 Join Date: 3/10/11 Recent Posts

Hi All,

I am using liferay dxp and trying to execute backgroundtask as below. But finally getting an error as "class not found ........ ".

I have a module , where taskexecutor class resides in same module.

    ThemeDisplay themeDisplay = (ThemeDisplay)resourceRequest.getAttribute(WebKeys.THEME_DISPLAY);                Map<String, Serializable> taskContextMap = new HashMap<>();     taskContextMap.put("sample", new TestPoJO());   

try {         backgroundTaskmanager.addBackgroundTask(themeDisplay.getUserId(), themeDisplay.getScopeGroupId(), "test",                 com.liferay.backgroundtask.executor.TestBackGroundExecutor.class, taskContextMap, new ServiceContext());              } catch (PortalException e) {         e.printStackTrace();     }

Below is the task executor class

@Component(         immediate = true,         property = {             "background.task.executor.class.name=com.liferay.backgroundtask.executor.TestBackGroundExecutor"         },         service = BackgroundTaskExecutor.class     )
public class TestBackGroundExecutor extends BaseBackgroundTaskExecutor {

@Override     public BackgroundTaskResult execute(BackgroundTask backgroundTask) throws Exception {                  System.out.println("This is BackGround executor");                  Map<String, Serializable> map = backgroundTask.getTaskContextMap();         TestPoJO testPojo = (TestPoJO) map.get("sample");                          return BackgroundTaskResult.SUCCESS;     }

TestPOJO class as below, which resides in same module only.

package jquery.request.timeout.portlet;

public class TestPoJO implements Serializable {     private static final long serialVersionUID = 1L;          private String field1;

    public String getField1() {         return field1;     }

    public void setField1(String field1) {         this.field1 = field1;     }

}

So whenever i am trying to execute the class i am getting as error below

Caused by: java.lang.IllegalStateException: Unable to deserialize object     at com.liferay.portal.json.JSONFactoryImpl.deserialize(JSONFactoryImpl.java:188)     at com.liferay.portal.dao.orm.hibernate.MapType.nullSafeGet(MapType.java:95)     at org.hibernate.type.CompositeCustomType.nullSafeGet(CompositeCustomType.java:213)     at org.hibernate.type.AbstractType.hydrate(AbstractType.java:104)     at org.hibernate.persister.entity.AbstractEntityPersister.hydrate(AbstractEntityPersister.java:2283)     at org.hibernate.loader.Loader.loadFromResultSet(Loader.java:1527)     at org.hibernate.loader.Loader.instanceNotYetLoaded(Loader.java:1455)     at org.hibernate.loader.Loader.getRow(Loader.java:1355)     at org.hibernate.loader.Loader.getRowFromResultSet(Loader.java:611)     at org.hibernate.loader.Loader.doQuery(Loader.java:829)     at org.hibernate.loader.Loader.doQueryAndInitializeNonLazyCollections(Loader.java:274)     at org.hibernate.loader.Loader.loadEntity(Loader.java:2037)     at org.hibernate.loader.entity.AbstractEntityLoader.load(AbstractEntityLoader.java:86)     at org.hibernate.loader.entity.AbstractEntityLoader.load(AbstractEntityLoader.java:76)     at org.hibernate.persister.entity.AbstractEntityPersister.load(AbstractEntityPersister.java:3294)     at org.hibernate.event.def.DefaultLoadEventListener.loadFromDatasource(DefaultLoadEventListener.java:496)     at org.hibernate.event.def.DefaultLoadEventListener.doLoad(DefaultLoadEventListener.java:477)     at org.hibernate.event.def.DefaultLoadEventListener.load(DefaultLoadEventListener.java:227)     at org.hibernate.event.def.DefaultLoadEventListener.proxyOrLoad(DefaultLoadEventListener.java:269)     at org.hibernate.event.def.DefaultLoadEventListener.onLoad(DefaultLoadEventListener.java:152)     at org.hibernate.impl.SessionImpl.fireLoad(SessionImpl.java:1090)     at org.hibernate.impl.SessionImpl.get(SessionImpl.java:1005)     at org.hibernate.event.def.DefaultMergeEventListener.entityIsDetached(DefaultMergeEventListener.java:453)     at org.hibernate.event.def.DefaultMergeEventListener.onMerge(DefaultMergeEventListener.java:255)     at org.hibernate.event.def.DefaultMergeEventListener.onMerge(DefaultMergeEventListener.java:84)     at org.hibernate.impl.SessionImpl.fireMerge(SessionImpl.java:867)     at org.hibernate.impl.SessionImpl.merge(SessionImpl.java:851)     at org.hibernate.impl.SessionImpl.merge(SessionImpl.java:855)     at com.liferay.portal.dao.orm.hibernate.SessionImpl.merge(SessionImpl.java:241)     ... 28 more Caused by: org.jabsorb.serializer.UnmarshallException: key sample Class specified in javaClass hint not found: jquery.request.timeout.portlet.TestPoJO     at org.jabsorb.serializer.impl.MapSerializer.unmarshall(MapSerializer.java:270)     at org.jabsorb.JSONSerializer.unmarshall(JSONSerializer.java:692)     at com.liferay.portal.json.jabsorb.serializer.LiferayJSONSerializer.unmarshall(LiferayJSONSerializer.java:50)     at org.jabsorb.JSONSerializer.fromJSON(JSONSerializer.java:262)     at com.liferay.portal.json.JSONFactoryImpl.deserialize(JSONFactoryImpl.java:181)     ... 56 more Caused by: org.jabsorb.serializer.UnmarshallException: Class specified in javaClass hint not found: jquery.request.timeout.portlet.TestPoJO     at org.jabsorb.JSONSerializer.getClassFromHint(JSONSerializer.java:748)     at org.jabsorb.JSONSerializer.unmarshall(JSONSerializer.java:672)     at com.liferay.portal.json.jabsorb.serializer.LiferayJSONSerializer.unmarshall(LiferayJSONSerializer.java:50)     at org.jabsorb.serializer.impl.MapSerializer.unmarshall(MapSerializer.java:265)     ... 60 more Caused by: java.lang.ClassNotFoundException: jquery.request.timeout.portlet.TestPoJO     at org.apache.catalina.loader.WebappClassLoaderBase.loadClass(WebappClassLoaderBase.java:1308)     at org.apache.catalina.loader.WebappClassLoaderBase.loadClass(WebappClassLoaderBase.java:1142)     at java.lang.Class.forName0(Native Method)     at java.lang.Class.forName(Class.java:264)     at org.jabsorb.JSONSerializer.getClassFromHint(JSONSerializer.java:744)     ... 63 more

Please help me to resolve the issue.

Chris Huff, modified 7 Years ago.

RE: BackGroundTask is not working

Junior Member Posts: 25 Join Date: 4/14/11 Recent Posts

Is TestPOJO class externally exposed in your bnd (Export-Package:) file? the task will get picked up by the portla and I'm thinking the Portal may need access to that class.

Raghu teja, modified 7 Years ago.

RE: BackGroundTask is not working

Junior Member Posts: 61 Join Date: 3/10/11 Recent Posts

Thanks Chris Huff.

I didn't exposed the class in bnd file. I will expose the class (Export-Package:) and try again. I will let you know the results.

Raghu teja, modified 7 Years ago.

RE: BackGroundTask is not working

Junior Member Posts: 61 Join Date: 3/10/11 Recent Posts

Hi,

I have tried to export the package in bnd. But still same error.

Please find the module in attachment.

Ravi Shah, modified 7 Years ago.

RE: BackGroundTask is not working

Junior Member Posts: 59 Join Date: 1/2/14 Recent Posts

Hi,

Can you please take a look at below link:

https://issues.liferay.com/browse/LPS-54220

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RE: BackGroundTask is not working