org.jgroups.protocols.pbcast.GmsImpl Maven / Gradle / Ivy
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This artifact provides a single jar that contains all classes required to use remote EJB and JMS, including
all dependencies. It is intended for use by those not using maven, maven users should just import the EJB and
JMS BOM's instead (shaded JAR's cause lots of problems with maven, as it is very easy to inadvertently end up
with different versions on classes on the class path).
package org.jgroups.protocols.pbcast;
import org.jgroups.Address;
import org.jgroups.EmptyMessage;
import org.jgroups.Message;
import org.jgroups.View;
import org.jgroups.logging.Log;
import org.jgroups.util.Digest;
import org.jgroups.util.MergeId;
import java.util.Collection;
import java.util.Map;
import java.util.Objects;
public abstract class GmsImpl {
protected final GMS gms;
protected final Merger merger;
protected final Leaver leaver;
protected final Log log;
protected GmsImpl(GMS gms) {
this.gms=gms;
merger=gms.merger;
leaver=gms.leaver;
log=gms.getLog();
}
public abstract void join(Address mbr, boolean useFlushIfPresent);
public abstract void joinWithStateTransfer(Address local_addr,boolean useFlushIfPresent);
public abstract void leave();
public void handleCoordLeave() {wrongMethod("handleCoordLeave");}
public void handleJoinResponse(JoinRsp join_rsp) {}
public void handleLeaveResponse(Address sender) {leaver.handleLeaveResponse(sender);}
public void suspect(Address mbr) {}
public void unsuspect(Address mbr) {}
public void merge(Map views) {}
public void handleMergeRequest(Address sender, MergeId merge_id, Collection mbrs) {}
public void handleMergeResponse(MergeData data, MergeId merge_id) {}
public void handleMergeView(MergeData data, MergeId merge_id) {}
public void handleMergeCancelled(MergeId merge_id) {} // only processed by coords
public void handleDigestResponse(Address sender, Digest digest) {} // only processed by coords
public void handleMembershipChange(Collection requests) {}
public void handleViewChange(View new_view, Digest digest) {}
public void init() throws Exception {}
public void start() throws Exception {}
public void stop() {}
protected void sendMergeRejectedResponse(Address sender, MergeId merge_id) {
Message msg=new EmptyMessage(sender).setFlag(Message.Flag.OOB);
GMS.GmsHeader hdr=new GMS.GmsHeader(GMS.GmsHeader.MERGE_RSP);
hdr.merge_rejected=true;
hdr.merge_id=merge_id;
msg.putHeader(gms.getId(), hdr);
log.debug("%s: merge response=%s", gms.getAddress(), hdr);
gms.getDownProtocol().down(msg);
}
protected void wrongMethod(String method_name) {
log.warn("%s: %s() should not be invoked on an instance of %s", gms.getAddress(), method_name, getClass().getName());
}
public static class Request {
public static final int JOIN = 1;
public static final int LEAVE = 2;
public static final int COORD_LEAVE = 3;
public static final int SUSPECT = 4;
public static final int MERGE = 5;
public static final int JOIN_WITH_STATE_TRANSFER = 6;
protected int type=-1;
protected Address mbr;
protected Map views; // different view on MERGE
protected boolean useFlushIfPresent;
public Request(int type) {
this.type=type;
}
public Request(int type, Address mbr) {
this(type);
this.mbr=mbr;
}
public Request(int type, Address mbr, Map views, boolean useFlushPresent) {
this(type, mbr);
this.views=views;
this.useFlushIfPresent=useFlushPresent;
}
public Request(int type, Address mbr, Map views) {
this(type, mbr, views, true);
}
public int getType() {return type;}
public boolean equals(Object obj) {
Request other=(Request)obj;
if(type != other.type)
return false;
switch(type) {
case JOIN:
case JOIN_WITH_STATE_TRANSFER:
case LEAVE:
case COORD_LEAVE:
case SUSPECT:
return Objects.equals(mbr, other.mbr);
case MERGE:
return Objects.equals(views, other.views);
default:
return false;
}
}
public int hashCode() {
return type + (mbr != null? mbr.hashCode() : 0) + (views != null? views.hashCode() : 0);
}
public String toString() {
switch(type) {
case JOIN: return String.format("JOIN(%s)", mbr);
case JOIN_WITH_STATE_TRANSFER: return String.format("JOIN_WITH_STATE_TRANSFER(%s)", mbr);
case LEAVE: return String.format("LEAVE(%s)", mbr);
case COORD_LEAVE: return "COORD_LEAVE";
case SUSPECT: return String.format("SUSPECT(%s)", mbr);
case MERGE: return String.format("MERGE(%d views)", views.size());
default: return String.format("