diff --git a/src/main/java/com/cloudius/urchin/main/Main.java b/src/main/java/com/cloudius/urchin/main/Main.java index b87b5e8..11c2663 100644 --- a/src/main/java/com/cloudius/urchin/main/Main.java +++ b/src/main/java/com/cloudius/urchin/main/Main.java @@ -4,7 +4,9 @@ package com.cloudius.urchin.main; import com.cloudius.urchin.api.APIClient; + import org.apache.cassandra.db.commitlog.CommitLog; +import org.apache.cassandra.gms.Gossiper; import org.apache.cassandra.net.MessagingService; import org.apache.cassandra.service.StorageService; @@ -16,6 +18,7 @@ public class Main { StorageService.getInstance(); MessagingService.getInstance(); CommitLog.getInstance(); + Gossiper.getInstance(); Thread.sleep(Long.MAX_VALUE); } diff --git a/src/main/java/org/apache/cassandra/gms/Gossiper.java b/src/main/java/org/apache/cassandra/gms/Gossiper.java new file mode 100644 index 0000000..a150ef0 --- /dev/null +++ b/src/main/java/org/apache/cassandra/gms/Gossiper.java @@ -0,0 +1,98 @@ +/* + * 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. + */ + +/* + * Copyright 2015 Cloudius Systems + * + * Modified by Cloudius Systems + */ +package org.apache.cassandra.gms; + +import java.lang.management.ManagementFactory; +import java.net.UnknownHostException; +import javax.management.MBeanServer; +import javax.management.ObjectName; + +import com.cloudius.urchin.api.APIClient; + +/** + * This module is responsible for Gossiping information for the local endpoint. + * This abstraction maintains the list of live and dead endpoints. Periodically + * i.e. every 1 second this module chooses a random node and initiates a round + * of Gossip with it. A round of Gossip involves 3 rounds of messaging. For + * instance if node A wants to initiate a round of Gossip with node B it starts + * off by sending node B a GossipDigestSynMessage. Node B on receipt of this + * message sends node A a GossipDigestAckMessage. On receipt of this message + * node A sends node B a GossipDigestAck2Message which completes a round of + * Gossip. This module as and when it hears one of the three above mentioned + * messages updates the Failure Detector with the liveness information. Upon + * hearing a GossipShutdownMessage, this module will instantly mark the remote + * node as down in the Failure Detector. + */ + +public class Gossiper implements GossiperMBean { + public static final String MBEAN_NAME = "org.apache.cassandra.net:type=Gossiper"; + + private static final java.util.logging.Logger logger = java.util.logging.Logger + .getLogger(Gossiper.class.getName()); + + private APIClient c = new APIClient(); + + public void log(String str) { + System.out.println(str); + logger.info(str); + } + + private static final Gossiper instance = new Gossiper(); + + public static Gossiper getInstance() { + return instance; + } + + private Gossiper() { + + // Register this instance with JMX + try { + MBeanServer mbs = ManagementFactory.getPlatformMBeanServer(); + mbs.registerMBean(this, new ObjectName(MBEAN_NAME)); + } catch (Exception e) { + throw new RuntimeException(e); + } + } + + public long getEndpointDowntime(String address) throws UnknownHostException { + log(" getEndpointDowntime(String address) throws UnknownHostException"); + return c.getLongValue(""); + } + + public int getCurrentGenerationNumber(String address) + throws UnknownHostException { + log(" getCurrentGenerationNumber(String address) throws UnknownHostException"); + return c.getIntValue(""); + } + + public void unsafeAssassinateEndpoint(String address) + throws UnknownHostException { + log(" unsafeAssassinateEndpoint(String address) throws UnknownHostException"); + } + + public void assassinateEndpoint(String address) throws UnknownHostException { + log(" assassinateEndpoint(String address) throws UnknownHostException"); + } + +} diff --git a/src/main/java/org/apache/cassandra/gms/GossiperMBean.java b/src/main/java/org/apache/cassandra/gms/GossiperMBean.java new file mode 100644 index 0000000..c4b244c --- /dev/null +++ b/src/main/java/org/apache/cassandra/gms/GossiperMBean.java @@ -0,0 +1,32 @@ +/* + * 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.cassandra.gms; + +import java.net.UnknownHostException; + +public interface GossiperMBean +{ + public long getEndpointDowntime(String address) throws UnknownHostException; + + public int getCurrentGenerationNumber(String address) throws UnknownHostException; + + public void unsafeAssassinateEndpoint(String address) throws UnknownHostException; + + public void assassinateEndpoint(String address) throws UnknownHostException; + +} \ No newline at end of file