protected void performBasicCheck() {
// update all alive times
Member[] members = super.getMembers();
for (int i = 0; members != null && i < members.length; i++) {
if (addSuspects.containsKey(members[i]) && membership.getMember(members[i]) == null) {
// avoid temporary adding member.
continue;
}
if (membership.memberAlive((MemberImpl) members[i])) {
// we don't have this one in our membership, check to see if he/she is alive
if (memberAlive(members[i])) {
log.warn("Member added, even though we werent notified:" + members[i]);
super.memberAdded(members[i]);
} else {
membership.removeMember((MemberImpl) members[i]);
}
}
}
// check suspect members if they are still alive,
// if not, simply issue the memberDisappeared message
MemberImpl[] keys = removeSuspects.keySet().toArray(new MemberImpl[removeSuspects.size()]);
for (int i = 0; i < keys.length; i++) {
MemberImpl m = keys[i];
if (membership.getMember(m) != null && (!memberAlive(m))) {
membership.removeMember(m);
super.memberDisappeared(m);
removeSuspects.remove(m);
if (log.isInfoEnabled()) log.info("Suspect member, confirmed dead.[" + m + "]");
} else {
if (removeSuspectsTimeout > 0) {
long timeNow = System.currentTimeMillis();
int timeIdle = (int) ((timeNow - removeSuspects.get(m).longValue()) / 1000L);
if (timeIdle > removeSuspectsTimeout) {
removeSuspects.remove(m); // remove suspect member
}
}
}
}
// check add suspects members if they are alive now,
// if they are, simply issue the memberAdded message
keys = addSuspects.keySet().toArray(new MemberImpl[addSuspects.size()]);
for (int i = 0; i < keys.length; i++) {
MemberImpl m = keys[i];
if (membership.getMember(m) == null && (memberAlive(m))) {
membership.memberAlive(m);
super.memberAdded(m);
addSuspects.remove(m);
if (log.isInfoEnabled()) log.info("Suspect member, confirmed alive.[" + m + "]");
}
}
}
/**
* Runs a refresh cycle and returns a list of members that has expired. This also removes the
* members from the membership, in such a way that getMembers() = getMembers() - expire()
*
* @param maxtime - the max time a member can remain unannounced before it is considered dead.
* @return the list of expired members
*/
public synchronized org.apache.catalina.tribes.membership.MemberImplRemoteInterface[] expire(
long maxtime) throws RemoteException {
try {
if (!hasMembers()) return EMPTY_MEMBERS;
ArrayList<org.apache.catalina.tribes.membership.MemberImplRemoteInterface> list = null;
Iterator<org.apache.catalina.tribes.membership.MembershipMbrEntryRemoteInterface> i =
getMapData().values().iterator();
while (i.hasNext()) {
org.apache.catalina.tribes.membership.MembershipMbrEntryRemoteInterface entry = i.next();
if (entry.hasExpired(maxtime)) {
if (list == null) // only need a list when members are expired (smaller gc)
list =
new java.util.ArrayList<
org.apache.catalina.tribes.membership.MemberImplRemoteInterface>();
list.add(entry.getMember());
}
}
if (list != null) {
org.apache.catalina.tribes.membership.MemberImplRemoteInterface[] result =
new org.apache.catalina.tribes.membership.MemberImplRemoteInterface[list.size()];
list.toArray(result);
for (int j = 0; j < result.length; j++) {
removeMember(result[j]);
}
return result;
} else {
return EMPTY_MEMBERS;
}
} catch (Exception excp) {
excp.printStackTrace();
}
return null;
}
protected void performForcedCheck() {
// update all alive times
Member[] members = super.getMembers();
for (int i = 0; members != null && i < members.length; i++) {
if (memberAlive(members[i])) {
if (membership.memberAlive((MemberImpl) members[i])) super.memberAdded(members[i]);
addSuspects.remove(members[i]);
} else {
if (membership.getMember(members[i]) != null) {
membership.removeMember((MemberImpl) members[i]);
removeSuspects.remove(members[i]);
if (members[i] instanceof StaticMember) {
addSuspects.put(members[i], Long.valueOf(System.currentTimeMillis()));
}
super.memberDisappeared(members[i]);
}
}
}
}
@Override
public void memberDisappeared(Member member) {
if (membership == null) setupMembership();
boolean notify = false;
boolean shutdown = Arrays.equals(member.getCommand(), Member.SHUTDOWN_PAYLOAD);
if (!shutdown)
if (log.isInfoEnabled())
log.info("Received memberDisappeared[" + member + "] message. Will verify.");
synchronized (membership) {
if (!membership.contains(member)) {
if (log.isInfoEnabled())
log.info("Verification complete. Member already disappeared[" + member + "]");
return;
}
// check to see if the member really is gone
// if the payload is not a shutdown message
if (shutdown || !memberAlive(member)) {
// not correct, we need to maintain the map
membership.removeMember((MemberImpl) member);
removeSuspects.remove(member);
if (member instanceof StaticMember) {
addSuspects.put(member, Long.valueOf(System.currentTimeMillis()));
}
notify = true;
} else {
// add the member as suspect
removeSuspects.put(member, Long.valueOf(System.currentTimeMillis()));
}
}
if (notify) {
if (log.isInfoEnabled())
log.info("Verification complete. Member disappeared[" + member + "]");
super.memberDisappeared(member);
} else {
if (log.isInfoEnabled())
log.info("Verification complete. Member still alive[" + member + "]");
}
}
