[camel] 05/05: CAMEL-17190: camel-quickfix - Use ref counters to keep track on engine usage, and stop engine when no longer in use. And start if needed, such as manually stop a route and then later start it again.

[da...@apache.org]

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davsclaus pushed a commit to branch main
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commit cd3f56ff718cb806c3e83781356068afaebd3b2d
Author: Claus Ibsen <cl...@gmail.com>
AuthorDate: Sat Nov 13 12:22:34 2021 +0100

    CAMEL-17190: camel-quickfix - Use ref counters to keep track on engine usage, and stop engine when no longer in use. And start if needed, such as manually stop a route and then later start it again.
---
 .../quickfixj/examples/RestartRouteExample.java    | 104 +++++++++++++++++++++
 1 file changed, 104 insertions(+)

diff --git a/components/camel-quickfix/src/test/java/org/apache/camel/component/quickfixj/examples/RestartRouteExample.java b/components/camel-quickfix/src/test/java/org/apache/camel/component/quickfixj/examples/RestartRouteExample.java
new file mode 100644
index 0000000..62b6db0
--- /dev/null
+++ b/components/camel-quickfix/src/test/java/org/apache/camel/component/quickfixj/examples/RestartRouteExample.java
@@ -0,0 +1,104 @@
+/*
+ * 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.camel.component.quickfixj.examples;
+
+import java.util.concurrent.CountDownLatch;
+import java.util.concurrent.TimeUnit;
+
+import org.apache.camel.Exchange;
+import org.apache.camel.ExchangePattern;
+import org.apache.camel.Producer;
+import org.apache.camel.builder.RouteBuilder;
+import org.apache.camel.component.quickfixj.QuickfixjEndpoint;
+import org.apache.camel.component.quickfixj.TestSupport;
+import org.apache.camel.component.quickfixj.examples.util.CountDownLatchDecrementer;
+import org.apache.camel.impl.DefaultCamelContext;
+import org.slf4j.Logger;
+import org.slf4j.LoggerFactory;
+import quickfix.field.MsgType;
+import quickfix.fix42.Email;
+
+/**
+ * Stopping a route should stop engine if no longer in use. And starting the route should start engine again.
+ */
+public class RestartRouteExample {
+    private static final Logger LOG = LoggerFactory.getLogger(RestartRouteExample.class);
+
+    public static void main(String[] args) throws Exception {
+        new RestartRouteExample().sendMessage();
+    }
+
+    public void sendMessage() throws Exception {
+        DefaultCamelContext context = new DefaultCamelContext();
+
+        final CountDownLatch receivedMessageLatch = new CountDownLatch(2);
+
+        RouteBuilder routes = new RouteBuilder() {
+            @Override
+            public void configure() throws Exception {
+                from("quickfix:examples/inprocess.cfg?sessionID=FIX.4.2:MARKET->TRADER").routeId("foo")
+                        .filter(header(QuickfixjEndpoint.MESSAGE_TYPE_KEY).isEqualTo(MsgType.EMAIL))
+                        .bean(new CountDownLatchDecrementer("message", receivedMessageLatch));
+            }
+        };
+
+        context.addRoutes(routes);
+
+        LOG.info("Starting Camel context");
+        context.start();
+
+        String marketUri = "quickfix:examples/inprocess.cfg?sessionID=FIX.4.2:TRADER->MARKET";
+        Producer producer = context.getEndpoint(marketUri).createProducer();
+
+        Email email = TestSupport.createEmailMessage("Example");
+        Exchange exchange = producer.getEndpoint().createExchange(ExchangePattern.InOnly);
+        exchange.getIn().setBody(email);
+        producer.process(exchange);
+
+        // wait a little before stopping
+        Thread.sleep(5000);
+
+        // stop route
+        context.getRouteController().stopRoute("foo");
+
+        // wait a little before starting
+        Thread.sleep(5000);
+
+        // start route again
+        context.getRouteController().startRoute("foo");
+
+        // wait a little before sending
+        Thread.sleep(5000);
+
+        // send another email
+        producer = context.getEndpoint(marketUri).createProducer();
+        email = TestSupport.createEmailMessage("Example2");
+        exchange = producer.getEndpoint().createExchange(ExchangePattern.InOnly);
+        exchange.getIn().setBody(email);
+        producer.process(exchange);
+
+        if (!receivedMessageLatch.await(30L, TimeUnit.SECONDS)) {
+            throw new IllegalStateException("Message did not reach market");
+        }
+
+        LOG.info("Message received, shutting down Camel context");
+
+        context.stop();
+
+        LOG.info("Example complete");
+    }
+}