diff options
Diffstat (limited to 'sandbox/sebastien/java/embed/samples/launcher-shell/src/main/java/sample/Shell.java')
| -rw-r--r-- | sandbox/sebastien/java/embed/samples/launcher-shell/src/main/java/sample/Shell.java | 197 |
1 files changed, 197 insertions, 0 deletions
diff --git a/sandbox/sebastien/java/embed/samples/launcher-shell/src/main/java/sample/Shell.java b/sandbox/sebastien/java/embed/samples/launcher-shell/src/main/java/sample/Shell.java new file mode 100644 index 0000000000..f2790409e9 --- /dev/null +++ b/sandbox/sebastien/java/embed/samples/launcher-shell/src/main/java/sample/Shell.java @@ -0,0 +1,197 @@ +/*
+ * 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 sample;
+
+import static java.lang.System.in;
+import static java.lang.System.out;
+import static java.util.Collections.emptyList;
+import static java.util.Collections.singletonList;
+
+import java.io.BufferedReader;
+import java.io.IOException;
+import java.io.InputStreamReader;
+import java.io.PrintWriter;
+import java.io.StringWriter;
+import java.util.ArrayList;
+import java.util.Arrays;
+import java.util.HashMap;
+import java.util.List;
+import java.util.Map;
+import java.util.concurrent.Callable;
+
+import org.apache.tuscany.sca.node.Contribution;
+import org.apache.tuscany.sca.node.Node;
+import org.apache.tuscany.sca.node.NodeFactory;
+
+/**
+ * A little SCA command shell.
+ */
+public class Shell {
+ final NodeFactory nodeFactory;
+
+ public static class NodeInfo {
+ final String name;
+ final String curi;
+ final String cloc;
+ final Node node;
+
+ NodeInfo(final String name, final String curi, final String cloc, final Node node) {
+ this.name = name;
+ this.curi = curi;
+ this.cloc = cloc;
+ this.node = node;
+ }
+
+ public String toString() {
+ return name + " " + curi + " " + cloc;
+ }
+ }
+
+ final Map<String, NodeInfo> nodes = new HashMap<String, NodeInfo>();
+ final List<String> history = new ArrayList<String>();
+
+ public Shell(NodeFactory nf) {
+ this.nodeFactory = nf;
+ }
+
+ List<?> start(final String name, final String curi, final String cloc) {
+ if(nodes.containsKey(name))
+ return emptyList();
+ final Node node = nodeFactory.createNode(new Contribution(curi, cloc));
+ nodes.put(name, new NodeInfo(name, curi, cloc, node));
+ node.start();
+ return emptyList();
+ }
+
+ List<?> stop(final String name) {
+ final NodeInfo ninfo = nodes.get(name);
+ if(ninfo == null)
+ return emptyList();
+ ninfo.node.stop();
+ nodes.remove(name);
+ return emptyList();
+ }
+
+ List<?> stop() {
+ for(NodeInfo ninfo: nodes.values())
+ ninfo.node.stop();
+ nodes.clear();
+ return emptyList();
+ }
+
+ List<?> restart(final String name, final String curi, final String cloc) {
+ stop(name);
+ return start(name, curi, cloc);
+ }
+
+ List<?> status() {
+ return new ArrayList<Object>(nodes.values());
+ }
+
+ List<?> history() {
+ return history;
+ }
+
+ List<?> bye() {
+ return null;
+ }
+
+ List<String> read(final BufferedReader r) throws IOException {
+ final String l = r.readLine();
+ history.add(l);
+ return l != null ? Arrays.asList(l.split(" ")) : singletonList("bye");
+ }
+
+ Callable<List<?>> eval(final List<String> toks) {
+ final String op = toks.get(0);
+ if(op.equals("start"))
+ return new Callable<List<?>>() {
+ public List<?> call() {
+ return start(toks.get(1), toks.get(2), toks.get(3));
+ }
+ };
+ if(op.equals("stop"))
+ return new Callable<List<?>>() {
+ public List<?> call() {
+ if(toks.size() == 1)
+ return stop();
+ return stop(toks.get(1));
+ }
+ };
+ if(op.equals("restart"))
+ return new Callable<List<?>>() {
+ public List<?> call() {
+ return restart(toks.get(1), toks.get(2), toks.get(3));
+ }
+ };
+ if(op.equals("status"))
+ return new Callable<List<?>>() {
+ public List<?> call() {
+ return status();
+ }
+ };
+ if(op.equals("history"))
+ return new Callable<List<?>>() {
+ public List<?> call() {
+ return history();
+ }
+ };
+ if(op.equals("bye"))
+ return new Callable<List<?>>() {
+ public List<?> call() {
+ return bye();
+ }
+ };
+ return new Callable<List<?>>() {
+ public List<?> call() {
+ return emptyList();
+ }
+ };
+ }
+
+ List<?> apply(final Callable<List<?>> func) {
+ try {
+ return func.call();
+ } catch(Exception e) {
+ StringWriter sw = new StringWriter();
+ e.printStackTrace(new PrintWriter(sw));
+ return singletonList(sw);
+ }
+ }
+
+ boolean print(final List<?> l, PrintWriter w) {
+ if(l == null)
+ return false;
+ for(Object o: l)
+ w.println(o);
+ return true;
+ }
+
+ public Map<String, NodeInfo> run(final BufferedReader r, final PrintWriter w) throws IOException {
+ while(print(apply(eval(read(r))), w))
+ ;
+ r.close();
+ return nodes;
+ }
+
+ public static void main(final String[] args) throws Exception {
+ new Shell(NodeFactory.newInstance()).run(new BufferedReader(new InputStreamReader(in)), new PrintWriter(out, true));
+ }
+}
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