#!/usr/bin/env python

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import os, signal, sys, time
from threading import Thread
from brokertest import *
from qpid import datatypes, messaging
from qpid.harness import Skipped


class ClusterTests(BrokerTest):
    """Cluster tests with support for testing with a store plugin."""

    def test_message_replication(self):
        """Test basic cluster message replication."""
        # Start a cluster, send some messages to member 0.
        cluster = self.cluster(2)
        s0 = cluster[0].connect().session()
        s0.sender("q {create:always}").send(messaging.Message("x"))
        s0.sender("q {create:always}").send(messaging.Message("y"))
        s0.connection.close()

        # Verify messages available on member 1.
        s1 = cluster[1].connect().session()
        m = s1.receiver("q", capacity=1).fetch(timeout=1)
        s1.acknowledge()
        self.assertEqual("x", m.content)
        s1.connection.close()

        # Start member 2 and verify messages available.
        s2 = cluster.start().connect().session()
        m = s2.receiver("q", capacity=1).fetch(timeout=1)
        s1.acknowledge()
        self.assertEqual("y", m.content)
        s2.connection.close()

    def test_failover(self):
        """Test fail-over during continuous send-receive"""
        # FIXME aconway 2009-11-09: this test is failing, showing lost messages.
        # Enable when fixed
        return                          # FIXME should be raise Skipped or negative test?

        # Original cluster will all be killed so expect exit with failure
        cluster = self.cluster(3, expect=EXPECT_EXIT_FAIL)

        # Start sender and receiver threads
        cluster[0].declare_queue("test-queue")
        self.receiver = Receiver(cluster[1])
        self.receiver.start()
        self.sender = Sender(cluster[2])
        self.sender.start()

        # Kill original brokers, start new ones.
        for i in range(3):
            cluster[i].kill()
            cluster.start()
            time.sleep(1)

        self.sender.stop()
        self.receiver.stop(self.sender.sent)