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Code Issues Projects Releases Wiki Activity

Look up conversation timestamp when creating group invitation messages.

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This commit is contained in:
akwizgran
2020-12-01 17:21:09 +00:00
parent 73b0e0356f
commit a8a905fb87
10 changed files with 107 additions and 52 deletions
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77
briar-android/src/main/java/org/briarproject/briar/android/privategroup/creation/CreateGroupControllerImpl.java
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@@ -7,6 +7,7 @@ import org.briarproject.bramble.api.crypto.CryptoExecutor;
import org.briarproject.bramble.api.db.DatabaseExecutor;
import org.briarproject.bramble.api.db.DbException;
import org.briarproject.bramble.api.db.NoSuchContactException;
import org.briarproject.bramble.api.db.TransactionManager;
import org.briarproject.bramble.api.identity.IdentityManager;
import org.briarproject.bramble.api.identity.LocalAuthor;
import org.briarproject.bramble.api.lifecycle.LifecycleManager;
@@ -15,6 +16,7 @@ import org.briarproject.bramble.api.sync.GroupId;
import org.briarproject.bramble.api.system.Clock;
import org.briarproject.briar.android.contactselection.ContactSelectorControllerImpl;
import org.briarproject.briar.android.controller.handler.ResultExceptionHandler;
import org.briarproject.briar.api.conversation.ConversationManager;
import org.briarproject.briar.api.identity.AuthorManager;
import org.briarproject.briar.api.privategroup.GroupMessage;
import org.briarproject.briar.api.privategroup.GroupMessageFactory;
@@ -36,6 +38,8 @@ import javax.inject.Inject;
import androidx.annotation.Nullable;
import static java.util.logging.Level.WARNING;
import static java.util.logging.Logger.getLogger;
import static org.briarproject.bramble.api.nullsafety.NullSafety.requireNonNull;
import static org.briarproject.bramble.util.LogUtils.logException;
@Immutable
@@ -44,9 +48,11 @@ class CreateGroupControllerImpl extends ContactSelectorControllerImpl
implements CreateGroupController {
private static final Logger LOG =
Logger.getLogger(CreateGroupControllerImpl.class.getName());
getLogger(CreateGroupControllerImpl.class.getName());
private final Executor cryptoExecutor;
private final TransactionManager db;
private final ConversationManager conversationManager;
private final ContactManager contactManager;
private final IdentityManager identityManager;
private final PrivateGroupFactory groupFactory;
@@ -57,17 +63,25 @@ class CreateGroupControllerImpl extends ContactSelectorControllerImpl
private final Clock clock;
@Inject
CreateGroupControllerImpl(@DatabaseExecutor Executor dbExecutor,
CreateGroupControllerImpl(
@DatabaseExecutor Executor dbExecutor,
@CryptoExecutor Executor cryptoExecutor,
LifecycleManager lifecycleManager, ContactManager contactManager,
AuthorManager authorManager, IdentityManager identityManager,
TransactionManager db,
ConversationManager conversationManager,
LifecycleManager lifecycleManager,
ContactManager contactManager,
AuthorManager authorManager,
IdentityManager identityManager,
PrivateGroupFactory groupFactory,
GroupMessageFactory groupMessageFactory,
PrivateGroupManager groupManager,
GroupInvitationFactory groupInvitationFactory,
GroupInvitationManager groupInvitationManager, Clock clock) {
GroupInvitationManager groupInvitationManager,
Clock clock) {
super(dbExecutor, lifecycleManager, contactManager, authorManager);
this.cryptoExecutor = cryptoExecutor;
this.db = db;
this.conversationManager = conversationManager;
this.contactManager = contactManager;
this.identityManager = identityManager;
this.groupFactory = groupFactory;
@@ -131,16 +145,24 @@ class CreateGroupControllerImpl extends ContactSelectorControllerImpl
ResultExceptionHandler<Void, DbException> handler) {
runOnDbThread(() -> {
try {
LocalAuthor localAuthor = identityManager.getLocalAuthor();
List<Contact> contacts = new ArrayList<>();
for (ContactId c : contactIds) {
try {
contacts.add(contactManager.getContact(c));
} catch (NoSuchContactException e) {
// Continue
db.transaction(true, txn -> {
List<InvitationContext> contexts = new ArrayList<>();
LocalAuthor localAuthor =
identityManager.getLocalAuthor(txn);
for (ContactId c : contactIds) {
try {
Contact contact = contactManager.getContact(txn, c);
long timestamp = conversationManager
.getTimestampForOutgoingMessage(txn, c);
contexts.add(
new InvitationContext(contact, timestamp));
} catch (NoSuchContactException e) {
// Continue
}
}
}
signInvitations(g, localAuthor, contacts, text, handler);
txn.attach(() -> signInvitations(g, localAuthor, contexts,
text, handler));
});
} catch (DbException e) {
logException(LOG, WARNING, e);
handler.onException(e);
@@ -149,16 +171,13 @@ class CreateGroupControllerImpl extends ContactSelectorControllerImpl
}
private void signInvitations(GroupId g, LocalAuthor localAuthor,
Collection<Contact> contacts, @Nullable String text,
List<InvitationContext> contexts, @Nullable String text,
ResultExceptionHandler<Void, DbException> handler) {
cryptoExecutor.execute(() -> {
long timestamp = clock.currentTimeMillis();
List<InvitationContext> contexts = new ArrayList<>();
for (Contact c : contacts) {
byte[] signature = groupInvitationFactory.signInvitation(c, g,
timestamp, localAuthor.getPrivateKey());
contexts.add(new InvitationContext(c.getId(), timestamp,
signature));
for (InvitationContext ctx : contexts) {
ctx.signature = groupInvitationFactory.signInvitation(
ctx.contact, g, timestamp, localAuthor.getPrivateKey());
}
sendInvitations(g, contexts, text, handler);
});
@@ -172,8 +191,9 @@ class CreateGroupControllerImpl extends ContactSelectorControllerImpl
for (InvitationContext context : contexts) {
try {
groupInvitationManager.sendInvitation(g,
context.contactId, text, context.timestamp,
context.signature);
context.contact.getId(), text,
context.timestamp,
requireNonNull(context.signature));
} catch (NoSuchContactException e) {
// Continue
}
@@ -188,15 +208,14 @@ class CreateGroupControllerImpl extends ContactSelectorControllerImpl
private static class InvitationContext {
private final ContactId contactId;
private final Contact contact;
private final long timestamp;
private final byte[] signature;
@Nullable
private byte[] signature = null;
private InvitationContext(ContactId contactId, long timestamp,
byte[] signature) {
this.contactId = contactId;
private InvitationContext(Contact contact, long timestamp) {
this.contact = contact;
this.timestamp = timestamp;
this.signature = signature;
}
}
}

35
briar-core/src/main/java/org/briarproject/briar/privategroup/invitation/AbstractProtocolEngine.java
View File

@@ -19,6 +19,7 @@ import org.briarproject.bramble.api.system.Clock;
import org.briarproject.bramble.api.versioning.ClientVersioningManager;
import org.briarproject.briar.api.autodelete.AutoDeleteManager;
import org.briarproject.briar.api.client.MessageTracker;
import org.briarproject.briar.api.conversation.ConversationManager;
import org.briarproject.briar.api.privategroup.GroupMessage;
import org.briarproject.briar.api.privategroup.GroupMessageFactory;
import org.briarproject.briar.api.privategroup.PrivateGroup;
@@ -31,6 +32,7 @@ import java.util.Map;
import javax.annotation.Nullable;
import javax.annotation.concurrent.Immutable;
import static java.lang.Math.max;
import static org.briarproject.briar.api.autodelete.AutoDeleteConstants.NO_AUTO_DELETE_TIMER;
import static org.briarproject.briar.privategroup.invitation.MessageType.ABORT;
import static org.briarproject.briar.privategroup.invitation.MessageType.INVITE;
@@ -54,6 +56,7 @@ abstract class AbstractProtocolEngine<S extends Session<?>>
private final MessageParser messageParser;
private final MessageEncoder messageEncoder;
private final AutoDeleteManager autoDeleteManager;
private final ConversationManager conversationManager;
private final Clock clock;
AbstractProtocolEngine(
@@ -68,6 +71,7 @@ abstract class AbstractProtocolEngine<S extends Session<?>>
MessageEncoder messageEncoder,
MessageTracker messageTracker,
AutoDeleteManager autoDeleteManager,
ConversationManager conversationManager,
Clock clock) {
this.db = db;
this.clientHelper = clientHelper;
@@ -80,6 +84,7 @@ abstract class AbstractProtocolEngine<S extends Session<?>>
this.messageEncoder = messageEncoder;
this.messageTracker = messageTracker;
this.autoDeleteManager = autoDeleteManager;
this.conversationManager = conversationManager;
this.clock = clock;
}
@@ -142,6 +147,7 @@ abstract class AbstractProtocolEngine<S extends Session<?>>
Message sendJoinMessage(Transaction txn, S s, boolean visibleInUi)
throws DbException {
Message m;
long localTimestamp = getLocalTimestamp(txn, s);
ContactId c = getContactId(txn, s.getContactGroupId());
if (contactSupportsAutoDeletion(txn, c)) {
// Set auto-delete timer if manually accepting an invitation
@@ -149,13 +155,13 @@ abstract class AbstractProtocolEngine<S extends Session<?>>
? autoDeleteManager.getAutoDeleteTimer(txn, c)
: NO_AUTO_DELETE_TIMER;
m = messageEncoder.encodeJoinMessage(s.getContactGroupId(),
s.getPrivateGroupId(), getLocalTimestamp(s),
s.getPrivateGroupId(), localTimestamp,
s.getLastLocalMessageId(), timer);
sendMessage(txn, m, JOIN, s.getPrivateGroupId(), visibleInUi,
timer);
} else {
m = messageEncoder.encodeJoinMessage(s.getContactGroupId(),
s.getPrivateGroupId(), getLocalTimestamp(s),
s.getPrivateGroupId(), localTimestamp,
s.getLastLocalMessageId());
sendMessage(txn, m, JOIN, s.getPrivateGroupId(), visibleInUi,
NO_AUTO_DELETE_TIMER);
@@ -166,6 +172,7 @@ abstract class AbstractProtocolEngine<S extends Session<?>>
Message sendLeaveMessage(Transaction txn, S s, boolean visibleInUi)
throws DbException {
Message m;
long localTimestamp = getLocalTimestamp(txn, s);
ContactId c = getContactId(txn, s.getContactGroupId());
if (contactSupportsAutoDeletion(txn, c)) {
// Set auto-delete timer if manually accepting an invitation
@@ -173,13 +180,13 @@ abstract class AbstractProtocolEngine<S extends Session<?>>
? autoDeleteManager.getAutoDeleteTimer(txn, c)
: NO_AUTO_DELETE_TIMER;
m = messageEncoder.encodeLeaveMessage(s.getContactGroupId(),
s.getPrivateGroupId(), getLocalTimestamp(s),
s.getPrivateGroupId(), localTimestamp,
s.getLastLocalMessageId(), timer);
sendMessage(txn, m, LEAVE, s.getPrivateGroupId(), visibleInUi,
timer);
} else {
m = messageEncoder.encodeLeaveMessage(s.getContactGroupId(),
s.getPrivateGroupId(), getLocalTimestamp(s),
s.getPrivateGroupId(), localTimestamp,
s.getLastLocalMessageId());
sendMessage(txn, m, LEAVE, s.getPrivateGroupId(), visibleInUi,
NO_AUTO_DELETE_TIMER);
@@ -190,7 +197,7 @@ abstract class AbstractProtocolEngine<S extends Session<?>>
Message sendAbortMessage(Transaction txn, S session) throws DbException {
Message m = messageEncoder.encodeAbortMessage(
session.getContactGroupId(), session.getPrivateGroupId(),
getLocalTimestamp(session));
getLocalTimestamp(txn, session));
sendMessage(txn, m, ABORT, session.getPrivateGroupId(), false,
NO_AUTO_DELETE_TIMER);
return m;
@@ -246,7 +253,7 @@ abstract class AbstractProtocolEngine<S extends Session<?>>
PrivateGroup privateGroup = privateGroupFactory.createPrivateGroup(
invite.getGroupName(), invite.getCreator(), invite.getSalt());
long timestamp =
Math.max(clock.currentTimeMillis(), invite.getTimestamp() + 1);
max(clock.currentTimeMillis(), invite.getTimestamp() + 1);
// TODO: Create the join message on the crypto executor
LocalAuthor member = identityManager.getLocalAuthor(txn);
GroupMessage joinMessage = groupMessageFactory.createJoinMessage(
@@ -256,10 +263,18 @@ abstract class AbstractProtocolEngine<S extends Session<?>>
.addPrivateGroup(txn, privateGroup, joinMessage, false);
}
long getLocalTimestamp(S session) {
return Math.max(clock.currentTimeMillis(),
Math.max(session.getLocalTimestamp(),
session.getInviteTimestamp()) + 1);
/**
* Returns a timestamp for an outgoing message, which is later than the
* timestamp of any message sent or received so far in the conversation
* or the session.
*/
long getLocalTimestamp(Transaction txn, S s) throws DbException {
ContactId c = getContactId(txn, s.getContactGroupId());
long conversationTimestamp =
conversationManager.getTimestampForOutgoingMessage(txn, c);
long sessionTimestamp =
max(s.getLocalTimestamp(), s.getInviteTimestamp()) + 1;
return max(conversationTimestamp, sessionTimestamp);
}
private void sendMessage(Transaction txn, Message m, MessageType type,

7
briar-core/src/main/java/org/briarproject/briar/privategroup/invitation/CreatorProtocolEngine.java
View File

@@ -15,6 +15,7 @@ import org.briarproject.briar.api.autodelete.AutoDeleteManager;
import org.briarproject.briar.api.client.MessageTracker;
import org.briarproject.briar.api.client.ProtocolStateException;
import org.briarproject.briar.api.client.SessionId;
import org.briarproject.briar.api.conversation.ConversationManager;
import org.briarproject.briar.api.privategroup.GroupMessageFactory;
import org.briarproject.briar.api.privategroup.PrivateGroupFactory;
import org.briarproject.briar.api.privategroup.PrivateGroupManager;
@@ -24,6 +25,7 @@ import org.briarproject.briar.api.privategroup.invitation.GroupInvitationRespons
import javax.annotation.Nullable;
import javax.annotation.concurrent.Immutable;
import static java.lang.Math.max;
import static org.briarproject.bramble.api.sync.Group.Visibility.INVISIBLE;
import static org.briarproject.bramble.api.sync.Group.Visibility.SHARED;
import static org.briarproject.briar.privategroup.invitation.CreatorState.DISSOLVED;
@@ -49,11 +51,12 @@ class CreatorProtocolEngine extends AbstractProtocolEngine<CreatorSession> {
MessageEncoder messageEncoder,
MessageTracker messageTracker,
AutoDeleteManager autoDeleteManager,
ConversationManager conversationManager,
Clock clock) {
super(db, clientHelper, clientVersioningManager, privateGroupManager,
privateGroupFactory, groupMessageFactory, identityManager,
messageParser, messageEncoder, messageTracker,
autoDeleteManager, clock);
autoDeleteManager, conversationManager, clock);
}
@Override
@@ -159,7 +162,7 @@ class CreatorProtocolEngine extends AbstractProtocolEngine<CreatorSession> {
// Track the message
messageTracker.trackOutgoingMessage(txn, sent);
// Move to the INVITED state
long localTimestamp = Math.max(timestamp, getLocalTimestamp(s));
long localTimestamp = max(timestamp, getLocalTimestamp(txn, s));
return new CreatorSession(s.getContactGroupId(), s.getPrivateGroupId(),
sent.getId(), s.getLastRemoteMessageId(), localTimestamp,
timestamp, INVITED);

7
briar-core/src/main/java/org/briarproject/briar/privategroup/invitation/InviteeProtocolEngine.java
View File

@@ -17,6 +17,7 @@ import org.briarproject.briar.api.autodelete.AutoDeleteManager;
import org.briarproject.briar.api.client.MessageTracker;
import org.briarproject.briar.api.client.ProtocolStateException;
import org.briarproject.briar.api.client.SessionId;
import org.briarproject.briar.api.conversation.ConversationManager;
import org.briarproject.briar.api.privategroup.GroupMessageFactory;
import org.briarproject.briar.api.privategroup.PrivateGroup;
import org.briarproject.briar.api.privategroup.PrivateGroupFactory;
@@ -42,7 +43,8 @@ import static org.briarproject.briar.privategroup.invitation.InviteeState.START;
@NotNullByDefault
class InviteeProtocolEngine extends AbstractProtocolEngine<InviteeSession> {
InviteeProtocolEngine(DatabaseComponent db,
InviteeProtocolEngine(
DatabaseComponent db,
ClientHelper clientHelper,
ClientVersioningManager clientVersioningManager,
PrivateGroupManager privateGroupManager,
@@ -53,11 +55,12 @@ class InviteeProtocolEngine extends AbstractProtocolEngine<InviteeSession> {
MessageEncoder messageEncoder,
MessageTracker messageTracker,
AutoDeleteManager autoDeleteManager,
ConversationManager conversationManager,
Clock clock) {
super(db, clientHelper, clientVersioningManager, privateGroupManager,
privateGroupFactory, groupMessageFactory, identityManager,
messageParser, messageEncoder, messageTracker,
autoDeleteManager, clock);
autoDeleteManager, conversationManager, clock);
}
@Override

4
briar-core/src/main/java/org/briarproject/briar/privategroup/invitation/PeerProtocolEngine.java
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@@ -15,6 +15,7 @@ import org.briarproject.bramble.api.versioning.ClientVersioningManager;
import org.briarproject.briar.api.autodelete.AutoDeleteManager;
import org.briarproject.briar.api.client.MessageTracker;
import org.briarproject.briar.api.client.ProtocolStateException;
import org.briarproject.briar.api.conversation.ConversationManager;
import org.briarproject.briar.api.privategroup.GroupMessageFactory;
import org.briarproject.briar.api.privategroup.PrivateGroupFactory;
import org.briarproject.briar.api.privategroup.PrivateGroupManager;
@@ -49,11 +50,12 @@ class PeerProtocolEngine extends AbstractProtocolEngine<PeerSession> {
MessageEncoder messageEncoder,
MessageTracker messageTracker,
AutoDeleteManager autoDeleteManager,
ConversationManager conversationManager,
Clock clock) {
super(db, clientHelper, clientVersioningManager, privateGroupManager,
privateGroupFactory, groupMessageFactory, identityManager,
messageParser, messageEncoder, messageTracker,
autoDeleteManager, clock);
autoDeleteManager, conversationManager, clock);
}
@Override

10
briar-core/src/main/java/org/briarproject/briar/privategroup/invitation/ProtocolEngineFactoryImpl.java
View File

@@ -8,6 +8,7 @@ import org.briarproject.bramble.api.system.Clock;
import org.briarproject.bramble.api.versioning.ClientVersioningManager;
import org.briarproject.briar.api.autodelete.AutoDeleteManager;
import org.briarproject.briar.api.client.MessageTracker;
import org.briarproject.briar.api.conversation.ConversationManager;
import org.briarproject.briar.api.privategroup.GroupMessageFactory;
import org.briarproject.briar.api.privategroup.PrivateGroupFactory;
import org.briarproject.briar.api.privategroup.PrivateGroupManager;
@@ -30,6 +31,7 @@ class ProtocolEngineFactoryImpl implements ProtocolEngineFactory {
private final MessageEncoder messageEncoder;
private final MessageTracker messageTracker;
private final AutoDeleteManager autoDeleteManager;
private final ConversationManager conversationManager;
private final Clock clock;
@Inject
@@ -45,6 +47,7 @@ class ProtocolEngineFactoryImpl implements ProtocolEngineFactory {
MessageEncoder messageEncoder,
MessageTracker messageTracker,
AutoDeleteManager autoDeleteManager,
ConversationManager conversationManager,
Clock clock) {
this.db = db;
this.clientHelper = clientHelper;
@@ -57,6 +60,7 @@ class ProtocolEngineFactoryImpl implements ProtocolEngineFactory {
this.messageEncoder = messageEncoder;
this.messageTracker = messageTracker;
this.autoDeleteManager = autoDeleteManager;
this.conversationManager = conversationManager;
this.clock = clock;
}
@@ -66,7 +70,7 @@ class ProtocolEngineFactoryImpl implements ProtocolEngineFactory {
clientVersioningManager, privateGroupManager,
privateGroupFactory, groupMessageFactory, identityManager,
messageParser, messageEncoder, messageTracker,
autoDeleteManager, clock);
autoDeleteManager, conversationManager, clock);
}
@Override
@@ -75,7 +79,7 @@ class ProtocolEngineFactoryImpl implements ProtocolEngineFactory {
clientVersioningManager, privateGroupManager,
privateGroupFactory, groupMessageFactory, identityManager,
messageParser, messageEncoder, messageTracker,
autoDeleteManager, clock);
autoDeleteManager, conversationManager, clock);
}
@Override
@@ -84,6 +88,6 @@ class ProtocolEngineFactoryImpl implements ProtocolEngineFactory {
clientVersioningManager, privateGroupManager,
privateGroupFactory, groupMessageFactory, identityManager,
messageParser, messageEncoder, messageTracker,
autoDeleteManager, clock);
autoDeleteManager, conversationManager, clock);
}
}

10
briar-core/src/test/java/org/briarproject/briar/privategroup/invitation/AbstractProtocolEngineTest.java
View File

@@ -19,6 +19,7 @@ import org.briarproject.bramble.api.versioning.ClientVersioningManager;
import org.briarproject.bramble.test.BrambleMockTestCase;
import org.briarproject.briar.api.autodelete.AutoDeleteManager;
import org.briarproject.briar.api.client.MessageTracker;
import org.briarproject.briar.api.conversation.ConversationManager;
import org.briarproject.briar.api.privategroup.GroupMessageFactory;
import org.briarproject.briar.api.privategroup.PrivateGroup;
import org.briarproject.briar.api.privategroup.PrivateGroupFactory;
@@ -62,6 +63,8 @@ abstract class AbstractProtocolEngineTest extends BrambleMockTestCase {
final MessageTracker messageTracker = context.mock(MessageTracker.class);
final AutoDeleteManager autoDeleteManager =
context.mock(AutoDeleteManager.class);
final ConversationManager conversationManager =
context.mock(ConversationManager.class);
final Clock clock = context.mock(Clock.class);
final Transaction txn = new Transaction(null, false);
@@ -115,9 +118,12 @@ abstract class AbstractProtocolEngineTest extends BrambleMockTestCase {
assertEquals(inviteTimestamp, s.getInviteTimestamp());
}
void expectGetLocalTimestamp(long time) {
void expectGetLocalTimestamp(long time) throws Exception {
context.checking(new Expectations() {{
oneOf(clock).currentTimeMillis();
oneOf(clientHelper).getContactId(txn, contactGroupId);
will(returnValue(contactId));
oneOf(conversationManager)
.getTimestampForOutgoingMessage(txn, contactId);
will(returnValue(time));
}});
}

3
briar-core/src/test/java/org/briarproject/briar/privategroup/invitation/CreatorProtocolEngineTest.java
View File

@@ -24,7 +24,8 @@ public class CreatorProtocolEngineTest extends AbstractProtocolEngineTest {
new CreatorProtocolEngine(db, clientHelper, clientVersioningManager,
privateGroupManager, privateGroupFactory,
groupMessageFactory, identityManager, messageParser,
messageEncoder, messageTracker, autoDeleteManager, clock);
messageEncoder, messageTracker, autoDeleteManager,
conversationManager, clock);
private CreatorSession getDefaultSession(CreatorState state) {
return new CreatorSession(contactGroupId, privateGroupId,

3
briar-core/src/test/java/org/briarproject/briar/privategroup/invitation/InviteeProtocolEngineTest.java
View File

@@ -43,7 +43,8 @@ public class InviteeProtocolEngineTest extends AbstractProtocolEngineTest {
new InviteeProtocolEngine(db, clientHelper, clientVersioningManager,
privateGroupManager, privateGroupFactory,
groupMessageFactory, identityManager, messageParser,
messageEncoder, messageTracker, autoDeleteManager, clock);
messageEncoder, messageTracker, autoDeleteManager,
conversationManager, clock);
private final LocalAuthor localAuthor = getLocalAuthor();
private InviteeSession getDefaultSession(InviteeState state) {

3
briar-core/src/test/java/org/briarproject/briar/privategroup/invitation/PeerProtocolEngineTest.java
View File

@@ -27,7 +27,8 @@ public class PeerProtocolEngineTest extends AbstractProtocolEngineTest {
new PeerProtocolEngine(db, clientHelper, clientVersioningManager,
privateGroupManager, privateGroupFactory,
groupMessageFactory, identityManager, messageParser,
messageEncoder, messageTracker, autoDeleteManager, clock);
messageEncoder, messageTracker, autoDeleteManager,
conversationManager, clock);
private PeerSession getDefaultSession(PeerState state) {
return new PeerSession(contactGroupId, privateGroupId,