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Apache Geode provides a database-like consistency model, reliable transaction processing and a shared-nothing architecture to maintain very low latency performance with high concurrency processing
/*
* 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.geode.internal.cache.persistence;
import java.util.HashMap;
import java.util.HashSet;
import java.util.List;
import java.util.Map;
import java.util.Set;
import java.util.concurrent.ConcurrentHashMap;
import org.apache.logging.log4j.Logger;
import org.apache.geode.cache.persistence.RevokedPersistentDataException;
import org.apache.geode.distributed.internal.DistributionManager;
import org.apache.geode.distributed.internal.MembershipListener;
import org.apache.geode.distributed.internal.ProfileListener;
import org.apache.geode.distributed.internal.membership.InternalDistributedMember;
import org.apache.geode.internal.i18n.LocalizedStrings;
import org.apache.geode.internal.logging.LogService;
import org.apache.geode.internal.logging.log4j.LocalizedMessage;
/**
*
*/
public class PersistentMemberManager {
private static final Logger logger = LogService.getLogger();
private final Set revocationListeners =
new HashSet();
private final Map revokedMembers =
new ConcurrentHashMap();
private Map pendingRevokes =
new HashMap();
private static final Object TOKEN = new Object();
public PersistentMemberManager() {}
public void revokeMember(PersistentMemberPattern pattern) {
cancelRevoke(pattern);
synchronized (this) {
if (revokedMembers.put(pattern, TOKEN) == null) {
logger.info(LocalizedMessage.create(LocalizedStrings.PersistenceAdvisorImpl_MEMBER_REVOKED,
pattern));
for (MemberRevocationListener listener : revocationListeners) {
listener.revoked(pattern);
}
}
}
}
/**
* Add a new revokation listener
*
* @param listener The revokocation listener
* @param recoveredRevokedMembers a set of members which the listener knows have been revoked
*/
public HashSet addRevocationListener(MemberRevocationListener listener,
Set recoveredRevokedMembers) {
synchronized (this) {
// Fix for 42607, don't allow us to start up a member if we're in the
// process of revoking that member.
for (PersistentMemberPattern pattern : pendingRevokes.keySet()) {
if (listener.matches(pattern)) {
throw new RevokedPersistentDataException(
LocalizedStrings.PersistentMemberManager_Member_0_is_already_revoked
.toLocalizedString(pattern));
}
}
for (PersistentMemberPattern pattern : revokedMembers.keySet()) {
if (listener.matches(pattern)) {
throw new RevokedPersistentDataException(
LocalizedStrings.PersistentMemberManager_Member_0_is_already_revoked
.toLocalizedString(pattern));
}
}
for (PersistentMemberPattern pattern : recoveredRevokedMembers) {
revokedMembers.put(pattern, TOKEN);
}
revocationListeners.add(listener);
return new HashSet(revokedMembers.keySet());
}
}
public void removeRevocationListener(ProfileListener listener) {
synchronized (this) {
revocationListeners.remove(listener);
}
}
public HashSet getRevokedMembers() {
synchronized (this) {
return new HashSet(revokedMembers.keySet());
}
}
/**
* Returns a map of the regions that are waiting to recover to the persistent member ids that each
* region is waiting for.
*/
public Map> getWaitingRegions() {
synchronized (this) {
Map> missingMemberIds =
new HashMap>();
for (MemberRevocationListener listener : revocationListeners) {
String regionPath = listener.getRegionPath();
Set ids = listener.getMissingMemberIds();
Set allIds = missingMemberIds.get(regionPath);
if (ids != null) {
if (allIds != null) {
allIds.addAll(ids);
} else {
allIds = ids;
missingMemberIds.put(regionPath, allIds);
}
}
}
return missingMemberIds;
}
}
/**
* Returns a set of the persistent ids that are running on this member.
*/
public Set getPersistentIDs() {
synchronized (this) {
Set localData = new HashSet();
for (MemberRevocationListener listener : revocationListeners) {
String regionPath = listener.getRegionPath();
listener.addPersistentIDs(localData);
}
return localData;
}
}
public boolean isRevoked(String regionPath, PersistentMemberID id) {
for (PersistentMemberPattern member : revokedMembers.keySet()) {
if (member.matches(id)) {
return true;
}
}
return false;
}
/**
* Prepare the revoke of a persistent id.
*
* @param pattern the pattern to revoke
* @param dm the distribution manager
* @param sender the originator of the prepare
* @return true if this member is not currently running the chosen disk store. false if the revoke
* should be aborted because the disk store is already running.
*/
public boolean prepareRevoke(PersistentMemberPattern pattern, DistributionManager dm,
InternalDistributedMember sender) {
if (logger.isDebugEnabled()) {
logger.debug("Preparing revoke if pattern {}", pattern);
}
PendingRevokeListener membershipListener = new PendingRevokeListener(pattern, sender, dm);
synchronized (this) {
for (MemberRevocationListener listener : revocationListeners) {
if (listener.matches(pattern)) {
return false;
}
}
pendingRevokes.put(pattern, membershipListener);
}
// Add a membership listener to make sure we cancel the pending
// revoke if the sender goes away.
// DO this outside the synch block to avoid lock ordering issues.
Set members = dm.addMembershipListenerAndGetDistributionManagerIds(membershipListener);
if (!members.contains(sender) && sender.equals(dm.getId())) {
cancelRevoke(pattern);
return false;
}
return true;
}
public void cancelRevoke(PersistentMemberPattern pattern) {
PendingRevokeListener listener;
synchronized (this) {
listener = pendingRevokes.remove(pattern);
}
if (listener != null) {
if (logger.isDebugEnabled()) {
logger.debug("Cancelling revoke of id {}", pattern);
}
listener.remove();
}
}
public static interface MemberRevocationListener {
public void revoked(PersistentMemberPattern pattern);
/**
* Add the persistent id(s) of this listener to the passed in set.
*/
public void addPersistentIDs(Set localData);
/**
* Return true if this is a listener for a resource that matches the persistent member pattern
* in question.
*/
public boolean matches(PersistentMemberPattern pattern);
/**
* Return the set of member ids which this resource knows are missing
*/
public Set getMissingMemberIds();
public String getRegionPath();
}
public class PendingRevokeListener implements MembershipListener {
InternalDistributedMember sender;
private PersistentMemberPattern pattern;
private DistributionManager dm;
public PendingRevokeListener(PersistentMemberPattern pattern, InternalDistributedMember sender,
DistributionManager dm) {
this.dm = dm;
this.pattern = pattern;
this.sender = sender;
}
@Override
public void memberJoined(InternalDistributedMember id) {
}
@Override
public void memberDeparted(InternalDistributedMember id, boolean crashed) {
if (id.equals(sender)) {
cancelRevoke(pattern);
}
}
@Override
public void memberSuspect(InternalDistributedMember id, InternalDistributedMember whoSuspected,
String reason) {}
@Override
public void quorumLost(Set failures,
List remaining) {}
public void remove() {
dm.removeAllMembershipListener(this);
}
}
}