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Diffstat (limited to '')
3 files changed, 153 insertions, 0 deletions
diff --git a/sca-java-2.x/contrib/samples/async-servlet-sca/src/main/java/sample/StockService.java b/sca-java-2.x/contrib/samples/async-servlet-sca/src/main/java/sample/StockService.java new file mode 100644 index 0000000000..84d6d90480 --- /dev/null +++ b/sca-java-2.x/contrib/samples/async-servlet-sca/src/main/java/sample/StockService.java @@ -0,0 +1,29 @@ +/* + * 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 java.util.Observer; + +public interface StockService { + + String getSymbol(); + Double getValue(); + void register(Observer observer); + +} diff --git a/sca-java-2.x/contrib/samples/async-servlet-sca/src/main/java/sample/StockServiceImpl.java b/sca-java-2.x/contrib/samples/async-servlet-sca/src/main/java/sample/StockServiceImpl.java new file mode 100644 index 0000000000..ebbc7519ff --- /dev/null +++ b/sca-java-2.x/contrib/samples/async-servlet-sca/src/main/java/sample/StockServiceImpl.java @@ -0,0 +1,63 @@ +/* + * 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 java.util.Date; +import java.util.Observable; +import java.util.Observer; +import java.util.Random; + +public class StockServiceImpl extends Observable implements StockService, + Runnable { + + public static final int MAX_VALUE = 1000; + public static final int MAX_SECONDS = 10; + public static final int MILLIS_PER_SECOND = 1000; + + private Random random = new Random(new Date().getTime()); + + @Override + public String getSymbol() { + return "ASF"; + } + + @Override + public Double getValue() { + return Math.abs(random.nextDouble() * random.nextInt(MAX_VALUE)); + } + + @Override + public void run() { + try { + while (true) { + setChanged(); + notifyObservers(); + Thread.sleep((random.nextInt(MAX_SECONDS - 1) + 1) * MILLIS_PER_SECOND); + } + } catch (InterruptedException e) { + // ignore + } + } + + @Override + public void register(Observer observer) { + this.addObserver(observer); + } + +} diff --git a/sca-java-2.x/contrib/samples/async-servlet-sca/src/main/java/sample/StockServlet.java b/sca-java-2.x/contrib/samples/async-servlet-sca/src/main/java/sample/StockServlet.java new file mode 100644 index 0000000000..a705b45f4e --- /dev/null +++ b/sca-java-2.x/contrib/samples/async-servlet-sca/src/main/java/sample/StockServlet.java @@ -0,0 +1,61 @@ +/* + * 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 java.io.IOException; +import java.io.Writer; +import java.util.Observable; +import java.util.Observer; + +import javax.servlet.AsyncContext; +import javax.servlet.ServletException; +import javax.servlet.annotation.WebServlet; +import javax.servlet.http.HttpServletRequest; +import javax.servlet.http.HttpServletResponse; + +import org.oasisopen.sca.annotation.Reference; + +@WebServlet(asyncSupported = true, urlPatterns = "stock/") +public class StockServlet implements Observer { + + @Reference + private StockService service; + + private AsyncContext asyncContext; + + protected void doGet(HttpServletRequest req, HttpServletResponse resp) + throws ServletException, IOException { + asyncContext = req.startAsync(req, resp); + service.register(this); + } + + @Override + public void update(Observable observable, Object arg) { + try { + asyncContext.getResponse().setContentType("text/html"); + Writer writer = asyncContext.getResponse().getWriter(); + writer.write("<span>Symbol: " + service.getSymbol() + ", Price " + + service.getValue() + "</span>"); + writer.flush(); + } catch (IOException e) { + // ignore + } + } + +} |