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Posted to dev@tomcat.apache.org by fh...@apache.org on 2006/06/14 00:07:02 UTC
svn commit: r413988 - in /tomcat/container/tc5.5.x/modules/groupcom:
src/share/org/apache/catalina/tribes/
src/share/org/apache/catalina/tribes/group/
src/share/org/apache/catalina/tribes/group/interceptors/
src/share/org/apache/catalina/tribes/members...
Author: fhanik
Date: Tue Jun 13 15:07:01 2006
New Revision: 413988
URL: http://svn.apache.org/viewvc?rev=413988&view=rev
Log:
Completed almost all of the coordinator, still need test cases for all the use cases that exists
Modified:
tomcat/container/tc5.5.x/modules/groupcom/src/share/org/apache/catalina/tribes/ChannelInterceptor.java
tomcat/container/tc5.5.x/modules/groupcom/src/share/org/apache/catalina/tribes/UniqueId.java
tomcat/container/tc5.5.x/modules/groupcom/src/share/org/apache/catalina/tribes/group/ChannelInterceptorBase.java
tomcat/container/tc5.5.x/modules/groupcom/src/share/org/apache/catalina/tribes/group/interceptors/NonBlockingCoordinator.java
tomcat/container/tc5.5.x/modules/groupcom/src/share/org/apache/catalina/tribes/group/interceptors/TcpFailureDetector.java
tomcat/container/tc5.5.x/modules/groupcom/src/share/org/apache/catalina/tribes/membership/McastService.java
tomcat/container/tc5.5.x/modules/groupcom/src/share/org/apache/catalina/tribes/util/Arrays.java
tomcat/container/tc5.5.x/modules/groupcom/test/java/org/apache/catalina/tribes/test/interceptors/TestNonBlockingCoordinator.java
Modified: tomcat/container/tc5.5.x/modules/groupcom/src/share/org/apache/catalina/tribes/ChannelInterceptor.java
URL: http://svn.apache.org/viewvc/tomcat/container/tc5.5.x/modules/groupcom/src/share/org/apache/catalina/tribes/ChannelInterceptor.java?rev=413988&r1=413987&r2=413988&view=diff
==============================================================================
--- tomcat/container/tc5.5.x/modules/groupcom/src/share/org/apache/catalina/tribes/ChannelInterceptor.java (original)
+++ tomcat/container/tc5.5.x/modules/groupcom/src/share/org/apache/catalina/tribes/ChannelInterceptor.java Tue Jun 13 15:07:01 2006
@@ -165,9 +165,14 @@
* @throws ChannelException if a startup error occurs or the service is already started.
* @see Channel
*/
- public void stop(int svc) throws ChannelException;
-
+ public void stop(int svc) throws ChannelException;
+ public void fireInterceptorEvent(InterceptorEvent event);
+
+ interface InterceptorEvent {
+ int getEventType();
+ ChannelInterceptor getInterceptor();
+ }
}
Modified: tomcat/container/tc5.5.x/modules/groupcom/src/share/org/apache/catalina/tribes/UniqueId.java
URL: http://svn.apache.org/viewvc/tomcat/container/tc5.5.x/modules/groupcom/src/share/org/apache/catalina/tribes/UniqueId.java?rev=413988&r1=413987&r2=413988&view=diff
==============================================================================
--- tomcat/container/tc5.5.x/modules/groupcom/src/share/org/apache/catalina/tribes/UniqueId.java (original)
+++ tomcat/container/tc5.5.x/modules/groupcom/src/share/org/apache/catalina/tribes/UniqueId.java Tue Jun 13 15:07:01 2006
@@ -60,5 +60,11 @@
public byte[] getBytes() {
return id;
}
+
+ public String toString() {
+ StringBuffer buf = new StringBuffer("UniqueId");
+ buf.append(org.apache.catalina.tribes.util.Arrays.toString(id));
+ return buf.toString();
+ }
}
Modified: tomcat/container/tc5.5.x/modules/groupcom/src/share/org/apache/catalina/tribes/group/ChannelInterceptorBase.java
URL: http://svn.apache.org/viewvc/tomcat/container/tc5.5.x/modules/groupcom/src/share/org/apache/catalina/tribes/group/ChannelInterceptorBase.java?rev=413988&r1=413987&r2=413988&view=diff
==============================================================================
--- tomcat/container/tc5.5.x/modules/groupcom/src/share/org/apache/catalina/tribes/group/ChannelInterceptorBase.java (original)
+++ tomcat/container/tc5.5.x/modules/groupcom/src/share/org/apache/catalina/tribes/group/ChannelInterceptorBase.java Tue Jun 13 15:07:01 2006
@@ -162,6 +162,10 @@
public void stop(int svc) throws ChannelException {
if (getNext() != null) getNext().stop(svc);
}
+
+ public void fireInterceptorEvent(InterceptorEvent event) {
+ //empty operation
+ }
}
Modified: tomcat/container/tc5.5.x/modules/groupcom/src/share/org/apache/catalina/tribes/group/interceptors/NonBlockingCoordinator.java
URL: http://svn.apache.org/viewvc/tomcat/container/tc5.5.x/modules/groupcom/src/share/org/apache/catalina/tribes/group/interceptors/NonBlockingCoordinator.java?rev=413988&r1=413987&r2=413988&view=diff
==============================================================================
--- tomcat/container/tc5.5.x/modules/groupcom/src/share/org/apache/catalina/tribes/group/interceptors/NonBlockingCoordinator.java (original)
+++ tomcat/container/tc5.5.x/modules/groupcom/src/share/org/apache/catalina/tribes/group/interceptors/NonBlockingCoordinator.java Tue Jun 13 15:07:01 2006
@@ -33,6 +33,9 @@
import java.util.concurrent.atomic.AtomicBoolean;
import java.util.concurrent.atomic.AtomicInteger;
import org.apache.catalina.tribes.membership.*;
+import org.apache.catalina.tribes.test.interceptors.TestNonBlockingCoordinator;
+import org.apache.catalina.tribes.ChannelInterceptor.InterceptorEvent;
+import org.apache.catalina.tribes.ChannelInterceptor;
/**
* <p>Title: Auto merging leader election algorithm</p>
@@ -187,6 +190,7 @@
synchronized (electionMutex) {
MemberImpl local = (MemberImpl)getLocalMember(false);
MemberImpl[] others = (MemberImpl[])membership.getMembers();
+ fireInterceptorEvent(new CoordinationEvent(CoordinationEvent.EVT_START_ELECT,this,"Election initated"));
if ( others.length == 0 ) {
this.viewId = new UniqueId(UUIDGenerator.randomUUID(false));
this.view = new Membership(local,AbsoluteOrder.comp, true);
@@ -201,19 +205,23 @@
suggestedviewId = msg.getId();
suggestedView = new Membership(local,AbsoluteOrder.comp,true);
Arrays.fill(suggestedView,msg.getMembers());
+ fireInterceptorEvent(new CoordinationEvent(CoordinationEvent.EVT_PROCESS_ELECT,this,"Election, sending request"));
sendElectionMsg(local,others[0],msg);
} else {
try {
coordMsgReceived.set(false);
+ fireInterceptorEvent(new CoordinationEvent(CoordinationEvent.EVT_WAIT_FOR_MSG,this,"Election, waiting for request"));
electionMutex.wait(waitForCoordMsgTimeout);
}catch ( InterruptedException x ) {
Thread.currentThread().interrupted();
}
if ( suggestedviewId == null && (!coordMsgReceived.get())) {
//no message arrived, send the coord msg
+ fireInterceptorEvent(new CoordinationEvent(CoordinationEvent.EVT_WAIT_FOR_MSG,this,"Election, waiting timed out."));
startElection(true);
}
}//end if
+ fireInterceptorEvent(new CoordinationEvent(CoordinationEvent.EVT_START_ELECT,this,"Election in progress"));
}
}
@@ -227,6 +235,7 @@
}
protected void sendElectionMsg(MemberImpl local, MemberImpl next, CoordinationMessage msg) throws ChannelException {
+ fireInterceptorEvent(new CoordinationEvent(CoordinationEvent.EVT_SEND_MSG,this,"Sending election message to("+next.getName()+")"));
super.sendMessage(new Member[] {next}, createData(msg, local), null);
}
@@ -269,6 +278,7 @@
}
protected Membership mergeOnArrive(CoordinationMessage msg, Member sender) {
+ fireInterceptorEvent(new CoordinationEvent(CoordinationEvent.EVT_PRE_MERGE,this,"Pre merge"));
MemberImpl local = (MemberImpl)getLocalMember(false);
Membership merged = new Membership(local,AbsoluteOrder.comp,true);
Arrays.fill(merged,msg.getMembers());
@@ -278,6 +288,7 @@
if (!alive(diff[i])) merged.removeMember((MemberImpl)diff[i]);
else memberAdded(diff[i],false);
}
+ fireInterceptorEvent(new CoordinationEvent(CoordinationEvent.EVT_POST_MERGE,this,"Post merge"));
return merged;
}
@@ -352,6 +363,7 @@
}
viewChange(viewId,view.getMembers());
+ fireInterceptorEvent(new CoordinationEvent(CoordinationEvent.EVT_CONF_RX,this,"Accepted View id("+this.viewId+")"));
if ( suggestedviewId == null && hasHigherPriority(merged.getMembers(),membership.getMembers()) ) {
startElection(false);
@@ -406,11 +418,14 @@
// OVERRIDDEN METHODS FROM CHANNEL INTERCEPTOR BASE
//============================================================================================================
public void start(int svc) throws ChannelException {
- if (started)return;
- super.start(startsvc);
if ( membership == null ) setupMembership();
- startElection(false);
+ if (started) return;
+ fireInterceptorEvent(new CoordinationEvent(CoordinationEvent.EVT_START,this,"Before start"));
+ super.start(startsvc);
started = true;
+ view = new Membership((MemberImpl)super.getLocalMember(true),AbsoluteOrder.comp,true);
+ fireInterceptorEvent(new CoordinationEvent(CoordinationEvent.EVT_START,this,"After start"));
+ startElection(false);
}
public void stop(int svc) throws ChannelException {
@@ -418,7 +433,9 @@
halt();
if ( !started ) return;
started = false;
+ fireInterceptorEvent(new CoordinationEvent(CoordinationEvent.EVT_STOP,this,"Before stop"));
super.stop(startsvc);
+ fireInterceptorEvent(new CoordinationEvent(CoordinationEvent.EVT_STOP,this,"After stop"));
}finally {
release();
}
@@ -433,9 +450,14 @@
public void messageReceived(ChannelMessage msg) {
if ( Arrays.contains(msg.getMessage().getBytesDirect(),0,COORD_ALIVE,0,COORD_ALIVE.length) ) {
//ignore message, its an alive message
+ fireInterceptorEvent(new CoordinationEvent(CoordinationEvent.EVT_MSG_ARRIVE,this,"Alive Message"));
+
} else if ( Arrays.contains(msg.getMessage().getBytesDirect(),0,COORD_HEADER,0,COORD_HEADER.length) ) {
try {
- processCoordMessage(new CoordinationMessage(msg.getMessage()), msg.getAddress());
+ CoordinationMessage cmsg = new CoordinationMessage(msg.getMessage());
+ Member[] cmbr = cmsg.getMembers();
+ fireInterceptorEvent(new CoordinationEvent(CoordinationEvent.EVT_MSG_ARRIVE,this,"Coord Msg Arrived("+Arrays.toNameString(cmbr)+")"));
+ processCoordMessage(cmsg, msg.getAddress());
}catch ( ChannelException x ) {
log.error("Error processing coordination message. Could be fatal.",x);
}
@@ -457,6 +479,7 @@
if ( membership == null ) setupMembership();
if ( membership.memberAlive((MemberImpl)member) ) super.memberAdded(member);
try {
+ fireInterceptorEvent(new CoordinationEvent(CoordinationEvent.EVT_MBR_ADD,this,"Member add"));
if (started && elect) startElection(false);
}catch ( ChannelException x ) {
log.error("Unable to start election when member was added.",x);
@@ -472,13 +495,20 @@
membership.removeMember((MemberImpl)member);
super.memberDisappeared(member);
try {
- if (started) startElection(false);
+ fireInterceptorEvent(new CoordinationEvent(CoordinationEvent.EVT_MBR_DEL,this,"Member remove"));
+ if ( started && (isCoordinator() || member.equals(getCoordinator())) )
+ startElection(false);
+ //to do, if a member disappears, only the coordinator can start
}catch ( ChannelException x ) {
log.error("Unable to start election when member was removed.",x);
}
}finally {
}
-
+ }
+
+ public boolean isCoordinator() {
+ Member coord = getCoordinator();
+ return coord != null && getLocalMember(false).equals(coord);
}
public void heartbeat() {
@@ -524,8 +554,7 @@
}
protected synchronized void setupMembership() {
- if ( view == null || membership == null ) {
- view = new Membership((MemberImpl)super.getLocalMember(true),AbsoluteOrder.comp,true);
+ if ( membership == null ) {
membership = new Membership((MemberImpl)super.getLocalMember(true),AbsoluteOrder.comp,false);
}
}
@@ -664,11 +693,65 @@
buf.append(id.getBytes(),0,id.getBytes().length);
buf.append(type,0,type.length);
}
+ }
+
+ public void fireInterceptorEvent(InterceptorEvent event) {
+ System.out.println(event);
+ }
+
+ public static class CoordinationEvent implements InterceptorEvent {
+ static final int EVT_START = 1;
+ static final int EVT_MBR_ADD = 2;
+ static final int EVT_MBR_DEL = 3;
+ static final int EVT_START_ELECT = 4;
+ static final int EVT_PROCESS_ELECT = 5;
+ static final int EVT_MSG_ARRIVE = 6;
+ static final int EVT_PRE_MERGE = 7;
+ static final int EVT_POST_MERGE = 8;
+ static final int EVT_WAIT_FOR_MSG = 9;
+ static final int EVT_SEND_MSG = 10;
+ static final int EVT_STOP = 11;
+ static final int EVT_CONF_RX = 12;
+
+ int type;
+ ChannelInterceptor interceptor;
+ Member coord;
+ Member[] mbrs;
+ String info;
+ Membership view;
+ Membership suggestedView;
+ public CoordinationEvent(int type,ChannelInterceptor interceptor, String info) {
+ this.type = type;
+ this.interceptor = interceptor;
+ this.coord = ((NonBlockingCoordinator)interceptor).getCoordinator();
+ this.mbrs = ((NonBlockingCoordinator)interceptor).membership.getMembers();
+ this.info = info;
+ this.view = ((NonBlockingCoordinator)interceptor).view;
+ this.suggestedView = ((NonBlockingCoordinator)interceptor).suggestedView;
+ }
+ public int getEventType() {
+ return type;
+ }
+ public ChannelInterceptor getInterceptor() {
+ return interceptor;
+ }
-
+ public String toString() {
+ StringBuffer buf = new StringBuffer("CoordinationEvent[type=");
+ buf.append(type).append("\n\tLocal:");
+ Member local = interceptor.getLocalMember(false);
+ buf.append(local!=null?local.getName():"").append("\n\tCoord:");
+ buf.append(coord!=null?coord.getName():"").append("\n\tView:");
+ buf.append(Arrays.toNameString(view!=null?view.getMembers():null)).append("\n\tSuggested View:");
+ buf.append(Arrays.toNameString(suggestedView!=null?suggestedView.getMembers():null)).append("\n\tMembers:");
+ buf.append(Arrays.toNameString(mbrs)).append("\n\tInfo:");
+ buf.append(info).append("]");
+ return buf.toString();
+ }
}
+
Modified: tomcat/container/tc5.5.x/modules/groupcom/src/share/org/apache/catalina/tribes/group/interceptors/TcpFailureDetector.java
URL: http://svn.apache.org/viewvc/tomcat/container/tc5.5.x/modules/groupcom/src/share/org/apache/catalina/tribes/group/interceptors/TcpFailureDetector.java?rev=413988&r1=413987&r2=413988&view=diff
==============================================================================
--- tomcat/container/tc5.5.x/modules/groupcom/src/share/org/apache/catalina/tribes/group/interceptors/TcpFailureDetector.java (original)
+++ tomcat/container/tc5.5.x/modules/groupcom/src/share/org/apache/catalina/tribes/group/interceptors/TcpFailureDetector.java Tue Jun 13 15:07:01 2006
@@ -131,10 +131,11 @@
public synchronized void memberDisappeared(Member member) {
if ( membership == null ) setupMembership();
- log.info("Received memberDisappeared["+member+"] message. Will verify.");
+ boolean shutdown = Arrays.equals(member.getPayload(),Member.SHUTDOWN_PAYLOAD);
+ if ( !shutdown ) log.info("Received memberDisappeared["+member+"] message. Will verify.");
//check to see if the member really is gone
//if the payload is not a shutdown message
- if ( !memberAlive(member) ) {
+ if ( shutdown || !memberAlive(member) ) {
//not correct, we need to maintain the map
membership.removeMember((MemberImpl)member);
super.memberDisappeared(member);
Modified: tomcat/container/tc5.5.x/modules/groupcom/src/share/org/apache/catalina/tribes/membership/McastService.java
URL: http://svn.apache.org/viewvc/tomcat/container/tc5.5.x/modules/groupcom/src/share/org/apache/catalina/tribes/membership/McastService.java?rev=413988&r1=413987&r2=413988&view=diff
==============================================================================
--- tomcat/container/tc5.5.x/modules/groupcom/src/share/org/apache/catalina/tribes/membership/McastService.java (original)
+++ tomcat/container/tc5.5.x/modules/groupcom/src/share/org/apache/catalina/tribes/membership/McastService.java Tue Jun 13 15:07:01 2006
@@ -134,7 +134,7 @@
* Return the local member
*/
public Member getLocalMember(boolean alive) {
- if ( alive ) localMember.setMemberAliveTime(System.currentTimeMillis()-impl.getServiceStartTime());
+ if ( alive && localMember != null ) localMember.setMemberAliveTime(System.currentTimeMillis()-impl.getServiceStartTime());
return localMember;
}
Modified: tomcat/container/tc5.5.x/modules/groupcom/src/share/org/apache/catalina/tribes/util/Arrays.java
URL: http://svn.apache.org/viewvc/tomcat/container/tc5.5.x/modules/groupcom/src/share/org/apache/catalina/tribes/util/Arrays.java?rev=413988&r1=413987&r2=413988&view=diff
==============================================================================
--- tomcat/container/tc5.5.x/modules/groupcom/src/share/org/apache/catalina/tribes/util/Arrays.java (original)
+++ tomcat/container/tc5.5.x/modules/groupcom/src/share/org/apache/catalina/tribes/util/Arrays.java Tue Jun 13 15:07:01 2006
@@ -30,7 +30,7 @@
* @version 1.0
*/
public class Arrays {
-
+
public static boolean contains(byte[] source, int srcoffset, byte[] key, int keyoffset, int length) {
if ( srcoffset < 0 || srcoffset >= source.length) throw new ArrayIndexOutOfBoundsException("srcoffset is out of bounds.");
if ( keyoffset < 0 || keyoffset >= key.length) throw new ArrayIndexOutOfBoundsException("keyoffset is out of bounds.");
@@ -51,15 +51,48 @@
public static String toString(byte[] data, int offset, int length) {
StringBuffer buf = new StringBuffer("{");
- buf.append(data[offset++]);
- length--;
- for ( int i=offset; i<length; i++ ) {
- buf.append(", ").append(data[i]);
+ if ( data != null && length > 0 ) {
+ buf.append(data[offset++]);
+ for (int i = offset; i < length; i++) {
+ buf.append(", ").append(data[i]);
+ }
+ }
+ buf.append("}");
+ return buf.toString();
+ }
+
+ public static String toString(Object[] data) {
+ return toString(data,0,data!=null?data.length:0);
+ }
+
+ public static String toString(Object[] data, int offset, int length) {
+ StringBuffer buf = new StringBuffer("{");
+ if ( data != null && length > 0 ) {
+ buf.append(data[offset++]);
+ for (int i = offset; i < length; i++) {
+ buf.append(", ").append(data[i]);
+ }
}
buf.append("}");
return buf.toString();
}
+ public static String toNameString(Member[] data) {
+ return toNameString(data,0,data!=null?data.length:0);
+ }
+
+ public static String toNameString(Member[] data, int offset, int length) {
+ StringBuffer buf = new StringBuffer("{");
+ if ( data != null && length > 0 ) {
+ buf.append(data[offset++].getName());
+ for (int i = offset; i < length; i++) {
+ buf.append(", ").append(data[i].getName());
+ }
+ }
+ buf.append("}");
+ return buf.toString();
+ }
+
public static int add(int[] data) {
int result = 0;
for (int i=0;i<data.length; i++ ) result += data[i];
Modified: tomcat/container/tc5.5.x/modules/groupcom/test/java/org/apache/catalina/tribes/test/interceptors/TestNonBlockingCoordinator.java
URL: http://svn.apache.org/viewvc/tomcat/container/tc5.5.x/modules/groupcom/test/java/org/apache/catalina/tribes/test/interceptors/TestNonBlockingCoordinator.java?rev=413988&r1=413987&r2=413988&view=diff
==============================================================================
--- tomcat/container/tc5.5.x/modules/groupcom/test/java/org/apache/catalina/tribes/test/interceptors/TestNonBlockingCoordinator.java (original)
+++ tomcat/container/tc5.5.x/modules/groupcom/test/java/org/apache/catalina/tribes/test/interceptors/TestNonBlockingCoordinator.java Tue Jun 13 15:07:01 2006
@@ -8,14 +8,17 @@
import org.apache.catalina.tribes.Member;
import junit.framework.TestSuite;
import junit.framework.TestResult;
+import org.apache.catalina.tribes.ChannelInterceptor.InterceptorEvent;
+import org.apache.catalina.tribes.ChannelInterceptor;
public class TestNonBlockingCoordinator extends TestCase {
GroupChannel[] channels = null;
NonBlockingCoordinator[] coordinators = null;
- int channelCount = 6;
+ int channelCount = 3;
Thread[] threads = null;
protected void setUp() throws Exception {
+ System.out.println("Setup");
super.setUp();
channels = new GroupChannel[channelCount];
coordinators = new NonBlockingCoordinator[channelCount];
@@ -39,32 +42,34 @@
}
for ( int i=0; i<channelCount; i++ ) threads[i].start();
for ( int i=0; i<channelCount; i++ ) threads[i].join();
+ Thread.sleep(10000);
}
public void testCoord1() throws Exception {
for (int i=1; i<channelCount; i++ )
assertEquals("Message count expected to be equal.",channels[i-1].getMembers().length,channels[i].getMembers().length);
-
Member member = coordinators[0].getCoordinator();
int cnt = 0;
while ( member == null && (cnt++ < 100 ) ) try {Thread.sleep(100); member = coordinators[0].getCoordinator();}catch ( Exception x){}
for (int i=0; i<channelCount; i++ ) super.assertEquals(member,coordinators[i].getCoordinator());
System.out.println("Coordinator[1] is:"+member);
+
}
- public void testCoord2() throws Exception {
+ public void stestCoord2() throws Exception {
+ Member member = coordinators[1].getCoordinator();
+ System.out.println("Coordinator[2a] is:" + member);
System.out.println("Shutting down:"+channels[0].getLocalMember(true).toString());
channels[0].stop(Channel.DEFAULT);
Thread.sleep(1000);
System.out.println("Member count:"+channels[1].getMembers().length);
- Member member = coordinators[1].getCoordinator();
+ member = coordinators[1].getCoordinator();
for (int i = 1; i < channelCount; i++)super.assertEquals(member, coordinators[i].getCoordinator());
- Thread.sleep(3000);
- System.out.println("Coordinator[2] is:" + member);
-
+ System.out.println("Coordinator[2b] is:" + member);
}
protected void tearDown() throws Exception {
+ System.out.println("tearDown");
super.tearDown();
for ( int i=0; i<channelCount; i++ ) {
channels[i].stop(Channel.DEFAULT);
@@ -76,6 +81,8 @@
suite.addTestSuite(TestNonBlockingCoordinator.class);
suite.run(new TestResult());
}
+
+
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