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Diffstat (limited to 'sca-java-1.x/branches/sca-java-0.99/samples/calculator-distributed/src/main/java/node/CalculatorNode.java')
-rw-r--r-- | sca-java-1.x/branches/sca-java-0.99/samples/calculator-distributed/src/main/java/node/CalculatorNode.java | 114 |
1 files changed, 114 insertions, 0 deletions
diff --git a/sca-java-1.x/branches/sca-java-0.99/samples/calculator-distributed/src/main/java/node/CalculatorNode.java b/sca-java-1.x/branches/sca-java-0.99/samples/calculator-distributed/src/main/java/node/CalculatorNode.java new file mode 100644 index 0000000000..bb939816bb --- /dev/null +++ b/sca-java-1.x/branches/sca-java-0.99/samples/calculator-distributed/src/main/java/node/CalculatorNode.java @@ -0,0 +1,114 @@ +/*
+ * 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 node;
+
+import java.io.File;
+import java.io.IOException;
+import java.net.URL;
+
+import org.apache.tuscany.sca.assembly.Binding;
+import org.apache.tuscany.sca.assembly.Component;
+import org.apache.tuscany.sca.assembly.ComponentReference;
+import org.apache.tuscany.sca.assembly.ComponentService;
+import org.apache.tuscany.sca.assembly.Composite;
+import org.apache.tuscany.sca.assembly.SCABinding;
+import org.apache.tuscany.sca.binding.sca.impl.SCABindingImpl;
+import org.apache.tuscany.sca.contribution.Contribution;
+import org.apache.tuscany.sca.contribution.service.ContributionService;
+import org.apache.tuscany.sca.distributed.domain.DistributedSCADomain;
+import org.apache.tuscany.sca.distributed.domain.impl.DistributedSCADomainMemoryImpl;
+import org.apache.tuscany.sca.distributed.domain.impl.DistributedSCADomainNetworkImpl;
+import org.apache.tuscany.sca.distributed.node.impl.EmbeddedNode;
+import org.apache.tuscany.sca.host.embedded.SCADomain;
+import org.apache.tuscany.sca.host.embedded.impl.EmbeddedSCADomain;
+
+import calculator.CalculatorService;
+
+/**
+ * This client program shows how to run a distributed SCA node. In this case a
+ * calculator node has been constructed specifically for running the calculator
+ * composite. Internally it creates a representation of a node and associates a
+ * distributed domain with the node. This separation is made different implementations
+ * of the distributed domain can be provided.
+ */
+public class CalculatorNode {
+
+
+ public static void main(String[] args) throws Exception {
+
+ // Check that the correct arguments have been provided
+ if (null == args || args.length != 2) {
+ System.err.println("Useage: java CalculatorNode domainname nodename");
+ System.exit(1);
+ }
+
+ try {
+ String domainName = args[0];
+ String nodeName = args[1];
+
+ // Create the distributed domain representation. We use the network implementation
+ // here so that the node contacts a registry running somewhere out on the
+ // network.
+ DistributedSCADomain distributedDomain = new DistributedSCADomainNetworkImpl(domainName);
+
+ // create the node that runs the calculator component
+ EmbeddedNode node = new EmbeddedNode(nodeName);
+ SCADomain domain = node.attachDomain(distributedDomain);
+
+ // the application components are added. The null here just gets the node
+ // implementation to read a directory from the classpath with the node name
+ // TODO - should be done as a management action.
+ node.addContribution(domainName, null);
+
+ // start the node
+ // TODO - should be done as a management action.
+ node.start();
+
+ // nodeA is the head node and runs some tests while all other nodes
+ // simply listen for incoming messages
+ if ( nodeName.equals("nodeA") ) {
+ // do some application stuff
+ CalculatorService calculatorService =
+ domain.getService(CalculatorService.class, "CalculatorServiceComponent");
+
+ // Calculate
+ System.out.println("3 + 2=" + calculatorService.add(3, 2));
+ System.out.println("3 - 2=" + calculatorService.subtract(3, 2));
+ System.out.println("3 * 2=" + calculatorService.multiply(3, 2));
+ System.out.println("3 / 2=" + calculatorService.divide(3, 2));
+ } else {
+ // start up and wait for messages
+ try {
+ System.out.println("Node started (press enter to shutdown)");
+ System.in.read();
+ } catch (IOException e) {
+ e.printStackTrace();
+ }
+ }
+
+ // stop the node and all the domains in it
+ domain.close();
+
+ } catch(Exception ex) {
+ System.err.println("Exception in node - " + ex.getMessage());
+ ex.printStackTrace(System.err);
+ }
+ }
+}
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