Package org.apache.tuscany.sca.core.context

Examples of org.apache.tuscany.sca.core.context.InstanceWrapper

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        }
        lifecycleState = STOPPED;
    }

    protected InstanceWrapper getInstanceWrapper(boolean create) throws TargetResolutionException {
        InstanceWrapper ctx = wrappers.get(Thread.currentThread());
        if (ctx == null && !create) {
            return null;
        }
        if (ctx == null) {
            ctx = super.createInstanceWrapper();
            try {
                ctx.start();
                wrappers.put(Thread.currentThread(), ctx);
            } catch (ThreadDeath td) {
                throw td;
            } catch (Throwable e) {
                try {
                    ctx.stop();
                } catch (ThreadDeath td) {
                    throw td;
                } catch (Throwable e2) {
                }
                throw new TargetInitializationException(e);
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        }

        try {
            // The following call might create a new conversation, as a result, the msg.getConversationID() might
            // return a new value
            InstanceWrapper wrapper = scopeContainer.getWrapper(contextId);

            // detects whether the scope container has created a conversation Id. This will
            // happen in the case that the component has conversational scope but only the
            // callback interface is conversational. Or in the callback case if the service interface
            // is conversational and the callback interface isn't. If we are in this situation we need
            // to get the contextId of this component and remove it after we have invoked the method on
            // it. It is possible that the component instance will not go away when it is removed below
            // because a callback conversation will still be holding a reference to it
            boolean removeTemporaryConversationalComponentAfterCall = false;
            if (parameters != null && (contextId == null) && (parameters.getConversationID() != null)) {
                contextId = parameters.getConversationID();
                removeTemporaryConversationalComponentAfterCall = true;
            }

            Object instance = wrapper.getInstance();

            // If the method couldn't be computed statically, or the instance being
            // invoked is a user-specified callback object that doesn't implement
            // the service interface from which the reflective method was obtained,
            // compute the method object dynamically for this invocation.
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        // Associates a callback conversation with this instance. Each time the scope container
        // is asked to remove an object given a ontextId an associated conversation object will
        // have its conversationId reset to null. When the list of ids is empty the component instance
        // will be removed from the scope container
        private void addCallbackConversation(Object conversationID) {
            InstanceWrapper ctx = getInstanceWrapper(clientConversationId);
            callbackConversations.add(conversationID);
            wrappers.put(conversationID, ctx);
        }
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        //
        // Return the backing implementation instance 
        //
        private InstanceWrapper getInstanceWrapper(Object contextId) {
            InstanceWrapper ctx = wrappers.get(contextId);
            return ctx;
        }
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            InstanceWrapper ctx = wrappers.get(contextId);
            return ctx;
        }

        private void removeInstanceWrapper(Object contextId) throws TargetDestructionException {
            InstanceWrapper ctx = getInstanceWrapper(contextId);
            wrappers.remove(contextId);

            // find out if we are dealing with the original client conversation id
            // and reset accordingly
            if ( ( clientConversationId != null ) && ( clientConversationId.equals(contextId)) ) {
                clientConversationId = null;
            } else {
                // reset the conversationId in the conversation object if present
                // so that and ending callback causes the conversation in the originating
                // service reference in the client to be reset
                callbackConversations.remove(contextId);
            }

            // stop the component if this removes the last reference
            if (clientConversationId == null && callbackConversations.isEmpty()) {
                ctx.stop();
            }
        }
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                ctx.stop();
            }
        }

        private void createInstance(Object contextId) throws TargetResolutionException {
            InstanceWrapper instanceWrapper = createInstanceWrapper();
            instanceWrapper.start();
            wrappers.put(contextId, instanceWrapper);
        }
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        }

        try {
            // The following call might create a new conversation, as a result, the msg.getConversationID() might
            // return a new value
            InstanceWrapper wrapper = scopeContainer.getWrapper(contextId);

            // detects whether the scope container has created a conversation Id. This will
            // happen in the case that the component has conversational scope but only the
            // callback interface is conversational. Or in the callback case if the service interface
            // is conversational and the callback interface isn't. If we are in this situation we need
            // to get the contextId of this component and remove it after we have invoked the method on
            // it. It is possible that the component instance will not go away when it is removed below
            // because a callback conversation will still be holding a reference to it
            boolean removeTemporaryConversationalComponentAfterCall = false;
            if (parameters != null && (contextId == null) && (parameters.getConversationID() != null)) {
                contextId = parameters.getConversationID();
                removeTemporaryConversationalComponentAfterCall = true;
            }

            Object instance = wrapper.getInstance();

            // If the method couldn't be computed statically, or the instance being
            // invoked is a user-specified callback object that doesn't implement
            // the service interface from which the reflective method was obtained,
            // compute the method object dynamically for this invocation.
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                            throw new IllegalArgumentException(
                                          "Callback object for stateful callback is not Serializable");
                        }
                        ScopeContainer scopeContainer = getConversationalScopeContainer(wire);
                        if (scopeContainer != null) {
                            InstanceWrapper wrapper = new CallbackObjectWrapper(callbackObject);
                            scopeContainer.registerWrapper(wrapper, conversation.getConversationID());
                        }
                        parameters.setCallbackObjectID(callbackObject);
                    }
                }
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        //
        // Return the backing implementation instance 
        //
        private InstanceWrapper getInstanceWrapper()
        {
          InstanceWrapper ctx = wrappers.get(this.instanceId);
          return ctx;
        }
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          return ctx;
        }
       
        private void removeInstanceWrapper() throws TargetDestructionException
        {
          InstanceWrapper ctx =  getInstanceWrapper();
          ctx.stop();
          wrappers.remove(this.instanceId);      
        }
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Related Classes of org.apache.tuscany.sca.core.context.InstanceWrapper

  • org.apache.tuscany.sca.core.invocation.JDKInvocationHandler
  • org.apache.tuscany.sca.core.invocation.RuntimeWireInvoker
  • org.apache.tuscany.sca.core.scope.ConversationalScopeContainer$InstanceLifeCycleWrapper
  • org.apache.tuscany.sca.core.scope.HttpSessionScopeContainer
  • org.apache.tuscany.sca.core.scope.RequestScopeContainer
  • org.apache.tuscany.sca.core.scope.StatelessScopeContainer
  • org.apache.tuscany.sca.implementation.java.invocation.JavaImplementationInvoker
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