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#ifndef TESTS_FORKEDBROKER_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/Exception.h"
#include "qpid/log/Statement.h"
#include "qpid/broker/Broker.h"
#include <boost/lexical_cast.hpp>
#include <string>
#include <stdio.h>
#include <sys/wait.h>
/**
* Class to fork a broker child process.
*
* For most tests a BrokerFixture may be more convenient as it starts
* a broker in the same process which allows you to easily debug into
* the broker.
*
* This useful for tests that need to start multiple brokers where
* those brokers can't coexist in the same process (e.g. for cluster
* tests where CPG doesn't allow multiple group members in a single
* process.)
*
*/
class ForkedBroker {
public:
ForkedBroker(std::vector<const char*> argv) { init(argv); }
ForkedBroker(int argc, const char* const argv[]) {
std::vector<const char*> args(argv, argv+argc);
init(args);
}
~ForkedBroker() {
try { stop(); } catch(const std::exception& e) {
QPID_LOG(error, QPID_MSG("Stopping forked broker: " << e.what()));
}
}
void stop() {
using qpid::ErrnoException;
if (pid == 0) return;
if (::kill(pid, SIGINT) < 0) throw ErrnoException("kill failed");
int status;
if (::waitpid(pid, &status, 0) < 0) throw ErrnoException("wait for forked process failed");
if (WEXITSTATUS(status) != 0)
throw qpid::Exception(QPID_MSG("forked broker exited with: " << WEXITSTATUS(status)));
pid = 0;
}
uint16_t getPort() { return port; }
private:
void init(const std::vector<const char*>& args) {
using qpid::ErrnoException;
pid = 0;
port = 0;
int pipeFds[2];
if(::pipe(pipeFds) < 0) throw ErrnoException("Can't create pipe");
pid = ::fork();
if (pid < 0) throw ErrnoException("Fork failed");
if (pid) { // parent
::close(pipeFds[1]);
FILE* f = ::fdopen(pipeFds[0], "r");
if (!f) throw ErrnoException("fopen failed");
if (::fscanf(f, "%d", &port) != 1) throw ErrnoException("ill-formatted port");
}
else { // child
::close(pipeFds[0]);
int fd = ::dup2(pipeFds[1], 1);
if (fd < 0) throw ErrnoException("dup2 failed");
const char* prog = "../qpidd";
std::vector<const char*> args2(args);
args2.push_back("--port=0");
args2.push_back("--mgmt-enable=no"); // TODO aconway 2008-07-16: why does mgmt cause problems?
args2.push_back(0);
execv(prog, const_cast<char* const*>(&args2[0]));
throw ErrnoException("execv failed");
}
}
pid_t pid;
int port;
};
#endif /*!TESTS_FORKEDBROKER_H*/
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