summaryrefslogtreecommitdiff
path: root/trunk/qpid/cpp/src/qpid/cluster/PollableQueue.h
diff options
context:
space:
mode:
Diffstat (limited to 'trunk/qpid/cpp/src/qpid/cluster/PollableQueue.h')
-rw-r--r--trunk/qpid/cpp/src/qpid/cluster/PollableQueue.h74
1 files changed, 74 insertions, 0 deletions
diff --git a/trunk/qpid/cpp/src/qpid/cluster/PollableQueue.h b/trunk/qpid/cpp/src/qpid/cluster/PollableQueue.h
new file mode 100644
index 0000000000..65f615d8b6
--- /dev/null
+++ b/trunk/qpid/cpp/src/qpid/cluster/PollableQueue.h
@@ -0,0 +1,74 @@
+#ifndef QPID_CLUSTER_POLLABLEQUEUE_H
+#define QPID_CLUSTER_POLLABLEQUEUE_H
+
+/*
+ *
+ * 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.
+ *
+ */
+
+#include "qpid/sys/PollableQueue.h"
+#include <qpid/log/Statement.h>
+
+namespace qpid {
+namespace cluster {
+
+/**
+ * More convenient version of PollableQueue that handles iterating
+ * over the batch and error handling.
+ */
+template <class T> class PollableQueue : public sys::PollableQueue<T> {
+ public:
+ typedef boost::function<void (const T&)> Callback;
+ typedef boost::function<void()> ErrorCallback;
+
+ PollableQueue(Callback f, ErrorCallback err, const std::string& msg,
+ const boost::shared_ptr<sys::Poller>& poller)
+ : sys::PollableQueue<T>(boost::bind(&PollableQueue<T>::handleBatch, this, _1),
+ poller),
+ callback(f), error(err), message(msg)
+ {}
+
+ typename sys::PollableQueue<T>::Batch::const_iterator
+ handleBatch(const typename sys::PollableQueue<T>::Batch& values) {
+ try {
+ typename sys::PollableQueue<T>::Batch::const_iterator i = values.begin();
+ while (i != values.end() && !this->isStopped()) {
+ callback(*i);
+ ++i;
+ }
+ return i;
+ }
+ catch (const std::exception& e) {
+ QPID_LOG(error, message << ": " << e.what());
+ this->stop();
+ error();
+ return values.end();
+ }
+ }
+
+ private:
+ Callback callback;
+ ErrorCallback error;
+ std::string message;
+};
+
+
+}} // namespace qpid::cluster
+
+#endif /*!QPID_CLUSTER_POLLABLEQUEUE_H*/