1 files changed, 193 insertions, 0 deletions
diff --git a/sandbox/rfeng/minicore/src/main/java/org/apache/tuscany/core/wire/NonBlockingInterceptor.java b/sandbox/rfeng/minicore/src/main/java/org/apache/tuscany/core/wire/NonBlockingInterceptor.java
new file mode 100644
index 0000000000..d4848cde71
--- /dev/null
+++ b/sandbox/rfeng/minicore/src/main/java/org/apache/tuscany/core/wire/NonBlockingInterceptor.java
@@ -0,0 +1,193 @@
+/*
+ * Licensed to the Apache Software Foundation (ASF) under one
+ * or more contributor license agreements.  See the NOTICE file
+ * distributed with this work for additional information
+ * regarding copyright ownership.  The ASF licenses this file
+ * to you 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.apache.tuscany.core.wire;
+
+import java.net.URI;
+import java.util.LinkedList;
+
+import org.osoa.sca.ServiceRuntimeException;
+
+import org.apache.tuscany.spi.component.WorkContext;
+import org.apache.tuscany.spi.model.Scope;
+import org.apache.tuscany.spi.services.work.WorkScheduler;
+import org.apache.tuscany.spi.wire.Interceptor;
+import org.apache.tuscany.spi.wire.Message;
+import org.apache.tuscany.spi.wire.TargetInvoker;
+import org.apache.tuscany.spi.wire.Wire;
+
+/**
+ * Adds non-blocking behavior to an invocation chain
+ *
+ * @version $$Rev$$ $$Date$$
+ */
+public class NonBlockingInterceptor implements Interceptor {
+
+    private static final Message RESPONSE = new ImmutableMessage();
+
+    private WorkScheduler workScheduler;
+    private WorkContext workContext;
+    private Interceptor next;
+
+    public NonBlockingInterceptor(WorkScheduler workScheduler, WorkContext workContext) {
+        this.workScheduler = workScheduler;
+        this.workContext = workContext;
+    }
+
+    public NonBlockingInterceptor(WorkScheduler workScheduler, WorkContext workContext, Interceptor next) {
+        this.workScheduler = workScheduler;
+        this.workContext = workContext;
+        this.next = next;
+    }
+
+    public Message invoke(final Message msg) {
+        // Retrieve conversation id to transfer to new thread
+        // Notice that we cannot clear the conversation id from the current thread
+        final Object conversationID = workContext.getIdentifier(Scope.CONVERSATION);
+        // Schedule the invocation of the next interceptor in a new Work instance
+        try {
+            workScheduler.scheduleWork(new Runnable() {
+                public void run() {
+                    workContext.setCorrelationId(null);
+                    // if we got a conversation id, transfer it to new thread
+                    if (conversationID != null) {
+                        workContext.setIdentifier(Scope.CONVERSATION, conversationID);
+                    }
+                    next.invoke(msg);
+                }
+            });
+        } catch (Exception e) {
+            throw new ServiceRuntimeException(e);
+        }
+        return RESPONSE;
+    }
+
+    public Interceptor getNext() {
+        return next;
+    }
+
+    public void setNext(Interceptor next) {
+        this.next = next;
+    }
+
+    public boolean isOptimizable() {
+        return false;
+    }
+
+    /**
+     * A dummy message passed back on an invocation
+     */
+    private static class ImmutableMessage implements Message {
+
+        public Object getBody() {
+            return null;
+        }
+
+        public void setBody(Object body) {
+            if (body != null) {
+                throw new UnsupportedOperationException();
+            }
+        }
+
+        public WorkContext getWorkContext() {
+            throw new UnsupportedOperationException();
+        }
+
+        public void setWorkContext(WorkContext workContext) {
+            throw new UnsupportedOperationException();
+        }
+
+        public void setTargetInvoker(TargetInvoker invoker) {
+            throw new UnsupportedOperationException();
+        }
+
+        public TargetInvoker getTargetInvoker() {
+            return null;
+        }
+
+        public Message getRelatedCallbackMessage() {
+            return null;
+        }
+
+        public URI getFromAddress() {
+            return null;
+        }
+
+        public void setFromAddress(URI fromAddress) {
+            throw new UnsupportedOperationException();
+        }
+
+        public void pushCallbackUri(URI fromAddress) {
+            throw new UnsupportedOperationException();
+        }
+
+        public LinkedList<URI> getCallbackUris() {
+            return null;
+        }
+
+        public void setCallbackUris(LinkedList<URI> uris) {
+            throw new UnsupportedOperationException();
+        }
+
+        public void pushCallbackWire(Wire wire) {
+
+        }
+
+        public LinkedList<Wire> getCallbackWires() {
+            return null;
+        }
+
+        public void setCallbackWires(LinkedList<Wire> wires) {
+
+        }
+
+        public Object getMessageId() {
+            return null;
+        }
+
+        public void setMessageId(Object messageId) {
+            throw new UnsupportedOperationException();
+        }
+
+        public Object getCorrelationId() {
+            return null;
+        }
+
+        public void setCorrelationId(Object correlationId) {
+            throw new UnsupportedOperationException();
+        }
+
+        public boolean isFault() {
+            return false;
+        }
+
+        public void setBodyWithFault(Object fault) {
+            throw new UnsupportedOperationException();
+        }
+
+        public short getConversationSequence() {
+            return TargetInvoker.NONE;
+        }
+
+        public void setConversationSequence(short sequence) {
+
+        }
+
+    }
+
+}