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/*
* 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/messaging/Connection.h>
#include <qpid/messaging/Duration.h>
#include <qmf/AgentSession.h>
#include <qmf/AgentEvent.h>
#include <qmf/Schema.h>
#include <qmf/SchemaProperty.h>
#include <qmf/SchemaMethod.h>
#include <qmf/Data.h>
#include <qmf/DataAddr.h>
#include <qpid/types/Variant.h>
#include <string>
#include <iostream>
using namespace std;
using namespace qmf;
using qpid::types::Variant;
using qpid::messaging::Duration;
class ExampleAgent {
public:
ExampleAgent(const string& url);
~ExampleAgent();
void setupSchema();
void populateData();
void run();
private:
qpid::messaging::Connection connection;
AgentSession session;
Schema sch_exception;
Schema sch_control;
Data control;
DataAddr controlAddr;
bool method(AgentEvent& event);
};
ExampleAgent::ExampleAgent(const string& url)
{
//
// Create and open a messaging connection to a broker.
//
connection = qpid::messaging::Connection(url, "{reconnect:True}");
connection.open();
//
// Create, configure, and open a QMFv2 agent session using the connection.
//
session = AgentSession(connection, "{interval:30}");
session.setVendor("profitron.com");
session.setProduct("gizmo");
session.setAttribute("attr1", 2000);
session.open();
}
ExampleAgent::~ExampleAgent()
{
//
// Clean up the QMF session and the AMQP connection.
//
session.close();
connection.close();
}
void ExampleAgent::setupSchema()
{
//
// Create and register schema for this agent.
//
string package("com.profitron.gizmo");
//
// Declare a schema for a structured exception that can be used in failed
// method invocations.
//
sch_exception = Schema(SCHEMA_TYPE_DATA, package, "exception");
sch_exception.addProperty(SchemaProperty("whatHappened", SCHEMA_DATA_STRING));
sch_exception.addProperty(SchemaProperty("howBad", SCHEMA_DATA_INT));
sch_exception.addProperty(SchemaProperty("details", SCHEMA_DATA_MAP));
//
// Declare a control object to test methods against.
//
sch_control = Schema(SCHEMA_TYPE_DATA, package, "control");
sch_control.addProperty(SchemaProperty("state", SCHEMA_DATA_STRING));
sch_control.addProperty(SchemaProperty("methodCount", SCHEMA_DATA_INT));
SchemaMethod stopMethod("stop", "{desc:'Stop Agent'}");
stopMethod.addArgument(SchemaProperty("message", SCHEMA_DATA_STRING));
sch_control.addMethod(stopMethod);
SchemaMethod echoMethod("echo", "{desc:'Echo Arguments'}");
echoMethod.addArgument(SchemaProperty("sequence", SCHEMA_DATA_INT, "{dir:INOUT}"));
echoMethod.addArgument(SchemaProperty("map", SCHEMA_DATA_MAP, "{dir:INOUT}"));
sch_control.addMethod(echoMethod);
SchemaMethod failMethod("fail", "{desc:'Expected to Fail'}");
failMethod.addArgument(SchemaProperty("useString", SCHEMA_DATA_BOOL, "{dir:IN}"));
failMethod.addArgument(SchemaProperty("stringVal", SCHEMA_DATA_STRING, "{dir:IN}"));
failMethod.addArgument(SchemaProperty("details", SCHEMA_DATA_MAP, "{dir:IN}"));
sch_control.addMethod(failMethod);
//
// Register our schemata with the agent session.
//
session.registerSchema(sch_exception);
session.registerSchema(sch_control);
}
void ExampleAgent::populateData()
{
//
// Create a control object and give it to the agent session to manage.
//
control = Data(sch_control);
control.setProperty("state", "OPERATIONAL");
control.setProperty("methodCount", 0);
controlAddr = session.addData(control, "singleton");
}
void ExampleAgent::run()
{
AgentEvent event;
bool running(true);
while (running) {
bool valid(session.nextEvent(event, Duration::SECOND));
if (valid && running) {
switch (event.getType()) {
case AGENT_METHOD:
running = method(event);
break;
}
}
}
}
bool ExampleAgent::method(AgentEvent& event)
{
const string& name(event.getMethodName());
control.setProperty("methodCount", control.getProperty("methodCount").asUint32() + 1);
if (controlAddr == event.getDataAddr()) {
if (name == "stop") {
cout << "Stopping: message=" << event.getArguments()["message"] << endl;
session.methodSuccess(event);
return false;
}
if (name == "echo") {
event.addReturnArgument("sequence", event.getArguments()["sequence"]);
event.addReturnArgument("map", event.getArguments()["map"]);
session.methodSuccess(event);
return true;
}
if (name == "fail") {
if (event.getArguments()["useString"])
session.raiseException(event, event.getArguments()["stringVal"]);
else {
Data ex(sch_exception);
ex.setProperty("whatHappened", "It Failed");
ex.setProperty("howBad", 75);
ex.setProperty("details", event.getArguments()["details"]);
session.raiseException(event, ex);
}
}
}
return true;
}
int main()
{
ExampleAgent agent("localhost");
agent.setupSchema();
agent.populateData();
agent.run();
}
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