IN VM Passthrough strategy, create ServiceClientFactory object when calling API from the same JVM as AEM Forms or LiveCycle server.

Environment

AEM Forms/LiveCycle

Steps

We usually write following code when invoking LiveCycle/AEM Forms JEE java API through a remote client for getting ServiceClientFactory object: 

Properties connectionProps = new Properties(); 
connectionProps.setProperty("DSC_DEFAULT_EJB_ENDPOINT", "remote://localhost:4447"); 
connectionProps.setProperty("DSC_TRANSPORT_PROTOCOL", ServiceClientFactoryProperties.DSC_EJB_PROTOCOL); 
connectionProps.setProperty("DSC_SERVER_TYPE", ServiceClientFactoryProperties.DSC_JBOSS_SERVER_TYPE); 
connectionProps.setProperty(ServiceClientFactoryProperties.DSC_CREDENTIAL_USERNAME, "administrator"); 
connectionProps.setProperty(ServiceClientFactoryProperties.DSC_CREDENTIAL_PASSWORD, "password");

//Create a ServiceClientFactory object 
ServiceClientFactory myFactory = ServiceClientFactory.createInstance(connectionProps);

But in case, we want to invoke these APIs in a DSC or 'Execute Script' in workflow, we could easily use in vm direct pass through invocation strategy (which is default).
Use below code to get ServiceClientFactory object using IN VM direct passthrough strategy:

ServiceClientFactory factory = ServiceClientFactory.createInstance();

Additional information

See javadoc for details. EJB invocation (endpoint) could be used either remotely or from same jvm. In AEM Forms 6.x with Jboss 6.x, using EJB endpoint, we get following exception:

11:07:50,598 INFO  [org.jboss.ejb.client.remoting] (Remoting "config-based-ejb-client-endpoint" task-9) EJBCLIENT000016: Channel Channel ID d0222b23 (outbound) of Remoting connection 42c6cf58 to localhost/127.0.0.1:4447 can no longer process messages
11:07:50,635 WARN  [com.arjuna.ats.jta] (http-/0.0.0.0:8080-6) ARJUNA016039: onePhaseCommit on < formatId=131077, gtrid_length=29, bqual_length=36, tx_uid=0:ffffac1e0177:-45bdf235:59bf841a:332d3, node_name=1, branch_uid=0:ffffac1e0177:-45bdf235:59bf841a:335f5, subordinatenodename=null, eis_name=unknown eis name > (ResourceImpl{transactionKey=0:ffffac1e0177:-45bdf235:59bf841a:332d3, ejbClientContext=org.jboss.ejb.client.EJBClientContext@5e76e7ac, nodeName='nt388082', state=null}) failed with exception -: java.lang.IllegalStateException: EJBCLIENT000027: No EJBReceiver available for node name nt388082
	at org.jboss.ejb.client.EJBClientContext.requireNodeEJBReceiver(EJBClientContext.java:842) [jboss-ejb-client-1.0.32.Final-redhat-1.jar:1.0.32.Final-redhat-1]
	at org.jboss.ejb.client.EJBClientContext.requireNodeEJBReceiverContext(EJBClientContext.java:883) [jboss-ejb-client-1.0.32.Final-redhat-1.jar:1.0.32.Final-redhat-1]
	at org.jboss.ejb.client.EJBClientManagedTransactionContext$ResourceImpl.commit(EJBClientManagedTransactionContext.java:237) [jboss-ejb-client-1.0.32.Final-redhat-1.jar:1.0.32.Final-redhat-1]
	at com.arjuna.ats.internal.jta.resources.arjunacore.XAResourceRecord.topLevelOnePhaseCommit(XAResourceRecord.java:682)
	at com.arjuna.ats.arjuna.coordinator.BasicAction.onePhaseCommit(BasicAction.java:2278)
	at com.arjuna.ats.arjuna.coordinator.BasicAction.End(BasicAction.java:1479)
	at com.arjuna.ats.arjuna.coordinator.TwoPhaseCoordinator.end(TwoPhaseCoordinator.java:98)
	at com.arjuna.ats.arjuna.AtomicAction.commit(AtomicAction.java:162)
	at com.arjuna.ats.internal.jta.transaction.arjunacore.TransactionImple.commitAndDisassociate(TransactionImple.java:1189)
	at com.arjuna.ats.internal.jta.transaction.arjunacore.BaseTransaction.commit(BaseTransaction.java:126)
	at com.arjuna.ats.jbossatx.BaseTransactionManagerDelegate.commit(BaseTransactionManagerDelegate.java:75)
	at org.jboss.as.ejb3.tx.CMTTxInterceptor.endTransaction(CMTTxInterceptor.java:91) [jboss-as-ejb3-7.5.5.Final-redhat-3.jar:7.5.5.Final-redhat-3]
	at org.jboss.as.ejb3.tx.CMTTxInterceptor.invokeInOurTx(CMTTxInterceptor.java:282) [jboss-as-ejb3-7.5.5.Final-redhat-3.jar:7.5.5.Final-redhat-3]
	at org.jboss.as.ejb3.tx.CMTTxInterceptor.requiresNew(CMTTxInterceptor.java:352) [jboss-as-ejb3-7.5.5.Final-redhat-3.jar:7.5.5.Final-redhat-3]
	at org.jboss.as.ejb3.tx.CMTTxInterceptor.processInvocation(CMTTxInterceptor.java:244) [jboss-as-ejb3-7.5.5.Final-redhat-3.jar:7.5.5.Final-redhat-3]
	at org.jboss.invocation.InterceptorContext.proceed(InterceptorContext.java:288) [jboss-invocation-1.1.2.Final-redhat-1.jar:1.1.2.Final-redhat-1]
	at org.jboss.as.ejb3.component.interceptors.CurrentInvocationContextInterceptor.processInvocation(CurrentInvocationContextInterceptor.java:41) [jboss-as-ejb3-7.5.5.Final-redhat-3.jar:7.5.5.Final-redhat-3]
	at org.jboss.invocation.InterceptorContext.proceed(InterceptorContext.java:288) [jboss-invocation-1.1.2.Final-redhat-1.jar:1.1.2.Final-redhat-1]
	at org.jboss.as.ejb3.component.invocationmetrics.WaitTimeInterceptor.processInvocation(WaitTimeInterceptor.java:43) [jboss-as-ejb3-7.5.5.Final-redhat-3.jar:7.5.5.Final-redhat-3]
	at org.jboss.invocation.InterceptorContext.proceed(InterceptorContext.java:288) [jboss-invocation-1.1.2.Final-redhat-1.jar:1.1.2.Final-redhat-1]
	at org.jboss.as.ejb3.component.interceptors.ShutDownInterceptorFactory$1.processInvocation(ShutDownInterceptorFactory.java:64) [jboss-as-ejb3-7.5.5.Final-redhat-3.jar:7.5.5.Final-redhat-3]
	at org.jboss.invocation.InterceptorContext.proceed(InterceptorContext.java:288) [jboss-invocation-1.1.2.Final-redhat-1.jar:1.1.2.Final-redhat-1]
	at org.jboss.as.ejb3.component.interceptors.LoggingInterceptor.processInvocation(LoggingInterceptor.java:59) [jboss-as-ejb3-7.5.5.Final-redhat-3.jar:7.5.5.Final-redhat-3]
	at org.jboss.invocation.InterceptorContext.proceed(InterceptorContext.java:288) [jboss-invocation-1.1.2.Final-redhat-1.jar:1.1.2.Final-redhat-1]
	at org.jboss.as.ejb3.component.interceptors.EjbExceptionTransformingInterceptorFactories$2.processInvocation(EjbExceptionTransformingInterceptorFactories.java:103) [jboss-as-ejb3-7.5.5.Final-redhat-3.jar:7.5.5.Final-redhat-3]
	at org.jboss.invocation.InterceptorContext.proceed(InterceptorContext.java:288) [jboss-invocation-1.1.2.Final-redhat-1.jar:1.1.2.Final-redhat-1]
	at org.jboss.as.ee.component.NamespaceContextInterceptor.processInvocation(NamespaceContextInterceptor.java:50) [jboss-as-ee-7.5.5.Final-redhat-3.jar:7.5.5.Final-redhat-3]
	at org.jboss.invocation.InterceptorContext.proceed(InterceptorContext.java:288) [jboss-invocation-1.1.2.Final-redhat-1.jar:1.1.2.Final-redhat-1]
	at org.jboss.as.ejb3.component.interceptors.AdditionalSetupInterceptor.processInvocation(AdditionalSetupInterceptor.java:55) [jboss-as-ejb3-7.5.5.Final-redhat-3.jar:7.5.5.Final-redhat-3]
	at org.jboss.invocation.InterceptorContext.proceed(InterceptorContext.java:288) [jboss-invocation-1.1.2.Final-redhat-1.jar:1.1.2.Final-redhat-1]
	at org.jboss.as.ee.component.TCCLInterceptor.processInvocation(TCCLInterceptor.java:45) [jboss-as-ee-7.5.5.Final-redhat-3.jar:7.5.5.Final-redhat-3]
	at org.jboss.invocation.InterceptorContext.proceed(InterceptorContext.java:288) [jboss-invocation-1.1.2.Final-redhat-1.jar:1.1.2.Final-redhat-1]
	at org.jboss.invocation.ChainedInterceptor.processInvocation(ChainedInterceptor.java:61) [jboss-invocation-1.1.2.Final-redhat-1.jar:1.1.2.Final-redhat-1]
	at org.jboss.as.ee.component.ViewService$View.invoke(ViewService.java:185) [jboss-as-ee-7.5.5.Final-redhat-3.jar:7.5.5.Final-redhat-3]
	at org.jboss.as.ee.component.ViewDescription$1.processInvocation(ViewDescription.java:185) [jboss-as-ee-7.5.5.Final-redhat-3.jar:7.5.5.Final-redhat-3]
	at org.jboss.invocation.InterceptorContext.proceed(InterceptorContext.java:288) [jboss-invocation-1.1.2.Final-redhat-1.jar:1.1.2.Final-redhat-1]
	at org.jboss.invocation.ChainedInterceptor.processInvocation(ChainedInterceptor.java:61) [jboss-invocation-1.1.2.Final-redhat-1.jar:1.1.2.Final-redhat-1]
	at org.jboss.as.ee.component.ProxyInvocationHandler.invoke(ProxyInvocationHandler.java:73) [jboss-as-ee-7.5.5.Final-redhat-3.jar:7.5.5.Final-redhat-3]
	at com.adobe.idp.dsc.transaction.impl.ejb.adapter.EjbTransactionCMTAdapterLocal$$$view75.doRequiresNew(Unknown Source) [adobe-dscf.jar:6.3.0.20170419.1.333177]
	at com.adobe.idp.dsc.transaction.impl.ejb.EjbTransactionProvider.execute(EjbTransactionProvider.java:143) [adobe-dscf.jar:6.3.0.20170419.1.333177]
	at com.adobe.idp.dsc.transaction.interceptor.TransactionInterceptor.intercept(TransactionInterceptor.java:72) [adobe-dscf.jar:6.3.0.20170419.1.333177]
	at com.adobe.idp.dsc.interceptor.impl.RequestInterceptorChainImpl.proceed(RequestInterceptorChainImpl.java:60) [adobe-dscf.jar:6.3.0.20170419.1.333177]
	at com.adobe.idp.dsc.interceptor.impl.InvocationStrategyInterceptor.intercept(InvocationStrategyInterceptor.java:55) [adobe-dscf.jar:6.3.0.20170419.1.333177]
	at com.adobe.idp.dsc.interceptor.impl.RequestInterceptorChainImpl.proceed(RequestInterceptorChainImpl.java:60) [adobe-dscf.jar:6.3.0.20170419.1.333177]
	at com.adobe.idp.dsc.interceptor.impl.InvalidStateInterceptor.intercept(InvalidStateInterceptor.java:37) [adobe-dscf.jar:6.3.0.20170419.1.333177]
	at com.adobe.idp.dsc.interceptor.impl.RequestInterceptorChainImpl.proceed(RequestInterceptorChainImpl.java:60) [adobe-dscf.jar:6.3.0.20170419.1.333177]
	at com.adobe.idp.dsc.interceptor.impl.AuthorizationInterceptor.intercept(AuthorizationInterceptor.java:188) [adobe-dscf.jar:6.3.0.20170419.1.333177]
	at com.adobe.idp.dsc.interceptor.impl.RequestInterceptorChainImpl.proceed(RequestInterceptorChainImpl.java:60) [adobe-dscf.jar:6.3.0.20170419.1.333177]
	at com.adobe.idp.dsc.interceptor.impl.JMXInterceptor.intercept(JMXInterceptor.java:48) [adobe-dscf.jar:6.3.0.20170419.1.333177]
	at com.adobe.idp.dsc.interceptor.impl.RequestInterceptorChainImpl.proceed(RequestInterceptorChainImpl.java:60) [adobe-dscf.jar:6.3.0.20170419.1.333177]
	at com.adobe.idp.dsc.engine.impl.ServiceEngineImpl.invoke(ServiceEngineImpl.java:121) [adobe-dscf.jar:6.3.0.20170419.1.333177]
	at com.adobe.idp.dsc.routing.Router.routeRequest(Router.java:131) [adobe-dscf-client.jar:6.3.0.20170419.1.333177]
	at com.adobe.idp.dsc.provider.impl.soap.axis.AdobeAxisServiceProvider.invokeMethod(AdobeAxisServiceProvider.java:222) [adobe-soap-provider.jar:6.3.0.20170419.1.333177]
	at org.apache.axis.providers.java.RPCProvider.processMessage(RPCProvider.java:186) [axis.jar:]
	at org.apache.axis.providers.java.JavaProvider.invoke(JavaProvider.java:323) [axis.jar:]
	at org.apache.axis.strategies.InvocationStrategy.visit(InvocationStrategy.java:32) [axis.jar:]
	at org.apache.axis.SimpleChain.doVisiting(SimpleChain.java:118) [axis.jar:]
	at org.apache.axis.SimpleChain.invoke(SimpleChain.java:83) [axis.jar:]
	at org.apache.axis.handlers.soap.SOAPService.invoke(SOAPService.java:454) [axis.jar:]
	at org.apache.axis.server.AxisServer.invoke(AxisServer.java:281) [axis.jar:]
	at org.apache.axis.transport.http.AxisServlet.doPost(AxisServlet.java:699) [axis.jar:]
	at javax.servlet.http.HttpServlet.service(HttpServlet.java:754) [jboss-servlet-api_3.0_spec-1.0.2.Final-redhat-2.jar:1.0.2.Final-redhat-2]
	at org.apache.axis.transport.http.AxisServletBase.service(AxisServletBase.java:327) [axis.jar:]
	at javax.servlet.http.HttpServlet.service(HttpServlet.java:847) [jboss-servlet-api_3.0_spec-1.0.2.Final-redhat-2.jar:1.0.2.Final-redhat-2]
	at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:295)
	at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:214)
	at com.adobe.idp.dsc.provider.impl.soap.axis.InvocationFilter.doFilter(InvocationFilter.java:43) [adobe-soap-provider.jar:6.3.0.20170419.1.333177]
	at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:246)
	at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:214)
	at com.adobe.idp.um.auth.filter.ParameterFilter.doFilter(ParameterFilter.java:105) [um.jar:]
	at com.adobe.idp.um.auth.filter.CSRFFilter.invokeNextFilter(CSRFFilter.java:142) [um.jar:]
	at com.adobe.idp.um.auth.filter.CSRFFilter.doFilter(CSRFFilter.java:133) [um.jar:]
	at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:246)
	at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:214)
	at org.apache.catalina.core.StandardWrapperValve.invoke(StandardWrapperValve.java:231)
	at org.apache.catalina.core.StandardContextValve.invoke(StandardContextValve.java:149)
	at org.jboss.as.web.security.SecurityContextAssociationValve.invoke(SecurityContextAssociationValve.java:169)
	at org.apache.catalina.core.StandardHostValve.invoke(StandardHostValve.java:150)
	at org.apache.catalina.valves.ErrorReportValve.invoke(ErrorReportValve.java:97)
	at org.apache.catalina.core.StandardEngineValve.invoke(StandardEngineValve.java:102)
	at org.apache.catalina.connector.CoyoteAdapter.service(CoyoteAdapter.java:344)
	at org.apache.coyote.http11.Http11Processor.process(Http11Processor.java:854)
	at org.apache.coyote.http11.Http11Protocol$Http11ConnectionHandler.process(Http11Protocol.java:653)
	at org.apache.tomcat.util.net.JIoEndpoint$Worker.run(JIoEndpoint.java:926)
	at java.lang.Thread.run(Thread.java:745) [rt.jar:1.8.0_74]

Though it is harmless, we could avoid this easily by using IN VM strategy, in case, we invoke it from same jvm.

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