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Code Issues Releases Wiki Activity

Prevent multi-instancing of OfflineMessageManager

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This commit is contained in:
Paul Schaub 2020-02-17 01:43:40 +01:00
parent 9d626bf787
commit 5ed594fe73
Signed by: vanitasvitae
GPG key ID: 62BEE9264BF17311
1 changed files with 28 additions and 15 deletions
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43
smack-extensions/src/main/java/org/jivesoftware/smackx/offline/OfflineMessageManager.java
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@ -19,9 +19,12 @@ package org.jivesoftware.smackx.offline;
import java.util.ArrayList;
import java.util.List;
import java.util.Map;
import java.util.WeakHashMap;
import java.util.logging.Level;
import java.util.logging.Logger;
import org.jivesoftware.smack.Manager;
import org.jivesoftware.smack.SmackException.NoResponseException;
import org.jivesoftware.smack.SmackException.NotConnectedException;
import org.jivesoftware.smack.StanzaCollector;
@ -58,19 +61,31 @@ import org.jivesoftware.smackx.xdata.Form;
*
* @author Gaston Dombiak
*/
public class OfflineMessageManager {
public final class OfflineMessageManager extends Manager {
private static final Logger LOGGER = Logger.getLogger(OfflineMessageManager.class.getName());
private static final String namespace = "http://jabber.org/protocol/offline";
private final XMPPConnection connection;
private static final Map<XMPPConnection, OfflineMessageManager> INSTANCES = new WeakHashMap<>();
private static final StanzaFilter PACKET_FILTER = new AndFilter(new StanzaExtensionFilter(
new OfflineMessageInfo()), StanzaTypeFilter.MESSAGE);
public OfflineMessageManager(XMPPConnection connection) {
this.connection = connection;
private ServiceDiscoveryManager serviceDiscoveryManager;
private OfflineMessageManager(XMPPConnection connection) {
super(connection);
this.serviceDiscoveryManager = ServiceDiscoveryManager.getInstanceFor(connection);
}
public static synchronized OfflineMessageManager getInstanceFor(XMPPConnection connection) {
OfflineMessageManager manager = INSTANCES.get(connection);
if (manager == null) {
manager = new OfflineMessageManager(connection);
INSTANCES.put(connection, manager);
}
return manager;
}
/**
@ -85,7 +100,7 @@ public class OfflineMessageManager {
* @throws InterruptedException if the calling thread was interrupted.
*/
public boolean supportsFlexibleRetrieval() throws NoResponseException, XMPPErrorException, NotConnectedException, InterruptedException {
return ServiceDiscoveryManager.getInstanceFor(connection).serverSupportsFeature(namespace);
return serviceDiscoveryManager.serverSupportsFeature(namespace);
}
/**
@ -99,8 +114,7 @@ public class OfflineMessageManager {
* @throws InterruptedException if the calling thread was interrupted.
*/
public int getMessageCount() throws NoResponseException, XMPPErrorException, NotConnectedException, InterruptedException {
DiscoverInfo info = ServiceDiscoveryManager.getInstanceFor(connection).discoverInfo(null,
namespace);
DiscoverInfo info = serviceDiscoveryManager.discoverInfo(null, namespace);
Form extendedInfo = Form.getFormFrom(info);
if (extendedInfo != null) {
String value = extendedInfo.getField("number_of_messages").getFirstValue();
@ -124,8 +138,7 @@ public class OfflineMessageManager {
*/
public List<OfflineMessageHeader> getHeaders() throws NoResponseException, XMPPErrorException, NotConnectedException, InterruptedException {
List<OfflineMessageHeader> answer = new ArrayList<>();
DiscoverItems items = ServiceDiscoveryManager.getInstanceFor(connection).discoverItems(
null, namespace);
DiscoverItems items = serviceDiscoveryManager.discoverItems(null, namespace);
for (DiscoverItems.Item item : items.getItems()) {
answer.add(new OfflineMessageHeader(item));
}
@ -165,8 +178,8 @@ public class OfflineMessageManager {
}
});
int pendingNodes = nodes.size();
try (StanzaCollector messageCollector = connection.createStanzaCollector(messageFilter)) {
connection.createStanzaCollectorAndSend(request).nextResultOrThrow();
try (StanzaCollector messageCollector = connection().createStanzaCollector(messageFilter)) {
connection().createStanzaCollectorAndSend(request).nextResultOrThrow();
// Collect the received offline messages
Message message;
do {
@ -199,11 +212,11 @@ public class OfflineMessageManager {
OfflineMessageRequest request = new OfflineMessageRequest();
request.setFetch(true);
StanzaCollector resultCollector = connection.createStanzaCollectorAndSend(request);
StanzaCollector resultCollector = connection().createStanzaCollectorAndSend(request);
StanzaCollector.Configuration messageCollectorConfiguration = StanzaCollector.newConfiguration().setStanzaFilter(PACKET_FILTER).setCollectorToReset(resultCollector);
List<Message> messages;
try (StanzaCollector messageCollector = connection.createStanzaCollector(messageCollectorConfiguration)) {
try (StanzaCollector messageCollector = connection().createStanzaCollector(messageCollectorConfiguration)) {
resultCollector.nextResultOrThrow();
// Be extra safe, cancel the message collector right here so that it does not collector
// other messages that eventually match (although I've no idea how this could happen in
@ -237,7 +250,7 @@ public class OfflineMessageManager {
item.setAction("remove");
request.addItem(item);
}
connection.createStanzaCollectorAndSend(request).nextResultOrThrow();
connection().createStanzaCollectorAndSend(request).nextResultOrThrow();
}
/**
@ -253,6 +266,6 @@ public class OfflineMessageManager {
OfflineMessageRequest request = new OfflineMessageRequest();
request.setType(IQ.Type.set);
request.setPurge(true);
connection.createStanzaCollectorAndSend(request).nextResultOrThrow();
connection().createStanzaCollectorAndSend(request).nextResultOrThrow();
}
}