/**
* Copyright 2008 Google Inc.
*
* Licensed 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.waveprotocol.wave.concurrencycontrol.client;
import junit.framework.TestCase;
import org.waveprotocol.wave.common.logging.PrintLogger;
import org.waveprotocol.wave.concurrencycontrol.common.ChannelException;
import org.waveprotocol.wave.concurrencycontrol.server.ConcurrencyControlCore;
import org.waveprotocol.wave.model.document.operation.DocInitialization;
import org.waveprotocol.wave.model.document.operation.SuperSink;
import org.waveprotocol.wave.model.document.operation.impl.DocOpUtil;
import org.waveprotocol.wave.model.document.util.DocProviders;
import org.waveprotocol.wave.model.operation.OpComparators;
import org.waveprotocol.wave.model.operation.OperationException;
import org.waveprotocol.wave.model.operation.TransformException;
import org.waveprotocol.wave.model.operation.wave.WaveletDelta;
import org.waveprotocol.wave.model.testing.DeltaTestUtil;
import org.waveprotocol.wave.model.version.HashedVersion;
import org.waveprotocol.wave.model.wave.ParticipantId;
import java.util.ArrayList;
import java.util.Arrays;
import java.util.List;
/**
* This tests the CC works with a client and server component. The actual
* operations used in this test is secondary.
*
* TODO(zdwang): Add more meaningful operations in the future more for a sanity
* check.
*
* @author zdwang@google.com (David Wang)
*/
public class ClientAndServerTest extends TestCase {
private static final DeltaTestUtil NOBODY_UTIL = new DeltaTestUtil("nobody@example.com");
/**
* Test Config to pretend editor did something or we got something on the wire from the server.
* @author zdwang@google.com (David Wang)
*/
private static final class TestConfig {
private final PrintLogger logger = new PrintLogger();
/** always start at version 0 */
private final SimpleDeltaHistory history = new SimpleDeltaHistory(genSignature(0));
private final ServerMock serverMock = new ServerMock(
new ConcurrencyControlCore(history), history);
private final List<ClientMock> clientMocks = new ArrayList<ClientMock>();
/**
* Constructor for test config.
* @param injectV0Delta by default we inject a NoOp at V0 due to a security constraint on
* OT, where you can't transform against V0. By injecting an op at v0, all clients can
* happily submit deltas concurrently.
*/
public TestConfig(String intialBlipXml, int numClients, boolean injectV0Delta)
throws TransformException, OperationException {
for (int i = 0; i < numClients; i++) {
ServerConnectionMock serverConnectionMock = new ServerConnectionMock();
serverConnectionMock.setServerMock(serverMock);
serverMock.addClientConnection(serverConnectionMock);
ConcurrencyControl clientCC = new ConcurrencyControl(logger, genSignature(0));
serverConnectionMock.setListener(clientCC);
ClientMock clientMock =
new ClientMock(clientCC, parse(intialBlipXml), new ParticipantId(i + "@example.com"),
serverConnectionMock);
clientCC.initialise(serverConnectionMock, clientMock);
clientMocks.add(clientMock);
// Always start at version 0.
try {
HashedVersion signature = genSignature(0);
clientCC.onOpen(signature, signature);
} catch (ChannelException e) {
fail("onOpen failed: " + e);
}
}
if (injectV0Delta) {
// Inject a single NoOp from a null connection, this ensures that all
// clients submit AFTER version 0.
WaveletDelta initialDelta = new WaveletDelta(NOBODY_UTIL.getAuthor(),
genSignature(0), Arrays.asList(NOBODY_UTIL.noOp()));
serverMock.receive(null, initialDelta);
serverProcessDeltas();
}
}
/**
* Pretend client did some insert at the given op versions. We don't need a version
* number as it's inferred in client CC.
*
* @throws OperationException
* @throws TransformException
*/
public TestConfig clientDoInsert(int clientNumber, int insertionPoint, String content)
throws OperationException, TransformException {
ClientMock clientMock = clientMocks.get(clientNumber);
clientMock.doInsert(insertionPoint, content);
clientMock.flush();
return this;
}
/**
* Predictable signature at given version.
*/
private HashedVersion genSignature(int version) {
return HashedVersion.of(version, new byte[] { (byte) version });
}
/**
* Process deltas from the clients on the server.
* @throws OperationException
* @throws TransformException
*/
public void serverProcessDeltas() throws TransformException, OperationException {
serverMock.start();
}
/**
* Make all the client read operations from CC.
*/
private void clientsReceiveServerOperations() {
for (ClientMock c : clientMocks) {
c.receiveServerOperations();
}
}
private static SuperSink parse(String xml) {
return DocProviders.POJO.parse(xml);
}
/**
* Check client has a document that looks like the following.
*/
public TestConfig checkClientDoc(int clientNumber, String xml) {
clientsReceiveServerOperations();
DocInitialization expected = parse(xml).asOperation();
DocInitialization actual = clientMocks.get(clientNumber).getDoc().asOperation();
assertTrue("[Expected: " + expected + "] [Actual: " + actual + "]",
OpComparators.SYNTACTIC_IDENTITY.equal(expected, actual));
return this;
}
/**
* Prevents sending the delta to the server. But the connection
* still seems connected.
*/
public void preventSending(int clientNumber) {
ClientMock client = clientMocks.get(clientNumber);
ServerConnectionMock connection = client.getConnection();
serverMock.removeClientConnection(connection);
connection.setServerMock(null);
}
/**
* Disconnect a single client from server.
*/
public void killClient(int clientNumber) {
ClientMock client = clientMocks.get(clientNumber);
ServerConnectionMock connection = client.getConnection();
serverMock.removeClientConnection(connection);
connection.setOpen(false);
connection.getReceivedDeltas().clear();
connection.getSentDeltas().clear();
connection.setServerMock(null);
}
/**
* Reconnect a single client from server
* @throws OperationException
* @throws TransformException
*/
public void reconnectClient(int clientNumber) throws ChannelException,
TransformException, OperationException {
ClientMock client = clientMocks.get(clientNumber);
ServerConnectionMock connection = client.getConnection();
serverMock.addClientConnection(connection);
connection.setServerMock(serverMock);
connection.setOpen(true);
connection.reconnect(client.getReconnectionVersions());
}
/**
* Turn all the deltas sent by a client into ghosts.
* @param ghostSend should the client's out going ops be ghosted.
*/
public void ghostClientDeltas(int clientNumber, boolean ghostSend) {
ClientMock client = clientMocks.get(clientNumber);
ServerConnectionMock connection = client.getConnection();
connection.setGhostSend(ghostSend);
}
/**
* Send all the ghosted deltas from a client.
*/
public void sendGhostDeltas(int clientNumber) {
ClientMock client = clientMocks.get(clientNumber);
ServerConnectionMock connection = client.getConnection();
connection.sendGhosts();
}
/**
* Reboots the server.
*
* @param version the version the server wakes up at
*/
public void rebootServer(int version) {
serverMock.reboot(version);
}
}
/**
* 2 Clients, one do some insert, followed by another client doing some stuff. No transformation
* on server
* @throws OperationException needed.
* @throws TransformException
*/
public void testSimple2Client() throws OperationException, TransformException {
TestConfig t = new TestConfig("<blip><p>abc</p></blip>", 2, true);
t.clientDoInsert(0, 2, "X").serverProcessDeltas();
t.checkClientDoc(0, "<blip><p>Xabc</p></blip>");
t.checkClientDoc(1, "<blip><p>Xabc</p></blip>");
t.clientDoInsert(1, 3, "Y").serverProcessDeltas();
t.checkClientDoc(0, "<blip><p>XYabc</p></blip>");
t.checkClientDoc(1, "<blip><p>XYabc</p></blip>");
t.clientDoInsert(0, 4, "Z").serverProcessDeltas();
t.checkClientDoc(0, "<blip><p>XYZabc</p></blip>");
t.checkClientDoc(1, "<blip><p>XYZabc</p></blip>");
}
/**
* 3 Clients, concurrently editing.
*
* @throws OperationException needed.
* @throws TransformException
*/
public void testConcurrent3Client() throws OperationException, TransformException {
TestConfig t = new TestConfig("<blip><p>abc</p></blip>", 3, true);
t.clientDoInsert(0, 2, "0X").clientDoInsert(1, 2, "1X").clientDoInsert(2, 2, "2X");
t.serverProcessDeltas();
t.checkClientDoc(0, "<blip><p>2X1X0Xabc</p></blip>");
t.checkClientDoc(1, "<blip><p>2X1X0Xabc</p></blip>");
t.checkClientDoc(2, "<blip><p>2X1X0Xabc</p></blip>");
// lots of concurrent editing
t.clientDoInsert(0, 5, "A").clientDoInsert(0, 6, "B");
t.clientDoInsert(1, 3, "E").clientDoInsert(1, 4, "F");
t.clientDoInsert(2, 6, "G").clientDoInsert(2, 7, "H");
t.serverProcessDeltas();
t.checkClientDoc(0, "<blip><p>2EFX1ABXGH0Xabc</p></blip>");
t.checkClientDoc(1, "<blip><p>2EFX1ABXGH0Xabc</p></blip>");
t.checkClientDoc(2, "<blip><p>2EFX1ABXGH0Xabc</p></blip>");
}
/**
* 1 Client dies and tries to recover.
*
* The disconnected client did not send any delta before disconnection.
*
* @throws OperationException needed.
* @throws TransformException
*/
public void testRecoveryNoUnacknowledged() throws Exception {
TestConfig t = new TestConfig("<blip><p>abc</p></blip>", 3, true);
t.clientDoInsert(0, 2, "0X").clientDoInsert(1, 2, "1X").clientDoInsert(2, 2, "2X");
t.serverProcessDeltas();
t.checkClientDoc(0, "<blip><p>2X1X0Xabc</p></blip>");
t.checkClientDoc(1, "<blip><p>2X1X0Xabc</p></blip>");
t.checkClientDoc(2, "<blip><p>2X1X0Xabc</p></blip>");
t.killClient(0);
t.clientDoInsert(0, 5, "A").clientDoInsert(0, 6, "B");
// lots of concurrent editing without client 0 connected
t.clientDoInsert(1, 3, "E").clientDoInsert(1, 4, "F");
t.clientDoInsert(2, 6, "G").clientDoInsert(2, 7, "H");
t.serverProcessDeltas();
t.checkClientDoc(0, "<blip><p>2X1ABX0Xabc</p></blip>");
t.checkClientDoc(1, "<blip><p>2EFX1XGH0Xabc</p></blip>");
t.checkClientDoc(2, "<blip><p>2EFX1XGH0Xabc</p></blip>");
// Reconnect client 1
t.reconnectClient(0);
t.serverProcessDeltas();
t.checkClientDoc(0, "<blip><p>2EFX1ABXGH0Xabc</p></blip>");
t.checkClientDoc(1, "<blip><p>2EFX1ABXGH0Xabc</p></blip>");
t.checkClientDoc(2, "<blip><p>2EFX1ABXGH0Xabc</p></blip>");
}
/**
* 1 Client dies and tries to recover.
*
* The disconnected client did set a delta before disconnection.
* The server got the delta.
*
* @throws OperationException needed.
* @throws TransformException
*/
public void testRecoveryUnacknowledgedRecieved() throws Exception {
TestConfig t = new TestConfig("<blip><p>abc</p></blip>", 3, true);
t.clientDoInsert(0, 2, "0X").clientDoInsert(1, 2, "1X").clientDoInsert(2, 2, "2X");
t.serverProcessDeltas();
t.checkClientDoc(0, "<blip><p>2X1X0Xabc</p></blip>");
t.checkClientDoc(1, "<blip><p>2X1X0Xabc</p></blip>");
t.checkClientDoc(2, "<blip><p>2X1X0Xabc</p></blip>");
t.clientDoInsert(0, 5, "A");
t.killClient(0);
t.clientDoInsert(0, 6, "B");
// lots of concurrent editing without client 0 connected
t.clientDoInsert(1, 3, "E").clientDoInsert(1, 4, "F");
t.clientDoInsert(2, 6, "G").clientDoInsert(2, 7, "H");
t.serverProcessDeltas();
t.checkClientDoc(0, "<blip><p>2X1ABX0Xabc</p></blip>");
t.checkClientDoc(1, "<blip><p>2EFX1AXGH0Xabc</p></blip>");
t.checkClientDoc(2, "<blip><p>2EFX1AXGH0Xabc</p></blip>");
// Reconnect client 1
t.reconnectClient(0);
t.serverProcessDeltas();
t.checkClientDoc(0, "<blip><p>2EFX1ABXGH0Xabc</p></blip>");
t.checkClientDoc(1, "<blip><p>2EFX1ABXGH0Xabc</p></blip>");
t.checkClientDoc(2, "<blip><p>2EFX1ABXGH0Xabc</p></blip>");
}
/**
* 1 Client dies and tries to recover.
*
* The disconnected client did set a delta before disconnection.
* The delta was not received by the server.
*
* @throws OperationException needed.
* @throws TransformException
*/
public void testRecoveryUnacknowledgedMissing() throws Exception {
TestConfig t = new TestConfig("<blip><p>abc</p></blip>", 3, true);
t.clientDoInsert(0, 2, "0X").clientDoInsert(1, 2, "1X").clientDoInsert(2, 2, "2X");
t.serverProcessDeltas();
t.checkClientDoc(0, "<blip><p>2X1X0Xabc</p></blip>");
t.checkClientDoc(1, "<blip><p>2X1X0Xabc</p></blip>");
t.checkClientDoc(2, "<blip><p>2X1X0Xabc</p></blip>");
t.preventSending(0);
t.clientDoInsert(0, 5, "A");
t.clientDoInsert(0, 6, "B");
t.killClient(0);
// lots of concurrent editing without client 0 connected
t.clientDoInsert(1, 3, "E").clientDoInsert(1, 4, "F");
t.clientDoInsert(2, 6, "G").clientDoInsert(2, 7, "H");
t.serverProcessDeltas();
t.checkClientDoc(0, "<blip><p>2X1ABX0Xabc</p></blip>");
t.checkClientDoc(1, "<blip><p>2EFX1XGH0Xabc</p></blip>");
t.checkClientDoc(2, "<blip><p>2EFX1XGH0Xabc</p></blip>");
// Reconnect client 1
t.reconnectClient(0);
t.serverProcessDeltas();
t.checkClientDoc(0, "<blip><p>2EFX1ABXGH0Xabc</p></blip>");
t.checkClientDoc(1, "<blip><p>2EFX1ABXGH0Xabc</p></blip>");
t.checkClientDoc(2, "<blip><p>2EFX1ABXGH0Xabc</p></blip>");
}
/**
* 1 Client dies and tries to recover several time.
*
* @throws OperationException needed.
* @throws TransformException
*/
public void testFlakyClient() throws Exception {
TestConfig t = new TestConfig("<blip><p>abc</p></blip>", 3, true);
t.clientDoInsert(0, 2, "0X").clientDoInsert(1, 2, "1X").clientDoInsert(2, 2, "2X");
t.serverProcessDeltas();
t.checkClientDoc(0, "<blip><p>2X1X0Xabc</p></blip>");
t.checkClientDoc(1, "<blip><p>2X1X0Xabc</p></blip>");
t.checkClientDoc(2, "<blip><p>2X1X0Xabc</p></blip>");
t.killClient(0);
// lots of concurrent editing without client 0 connected
t.clientDoInsert(1, 3, "E").clientDoInsert(1, 4, "F");
t.clientDoInsert(2, 6, "G").clientDoInsert(2, 7, "H");
t.serverProcessDeltas();
t.checkClientDoc(0, "<blip><p>2X1X0Xabc</p></blip>");
t.checkClientDoc(1, "<blip><p>2EFX1XGH0Xabc</p></blip>");
t.checkClientDoc(2, "<blip><p>2EFX1XGH0Xabc</p></blip>");
// Reconnect client 1
t.reconnectClient(0);
t.serverProcessDeltas();
t.checkClientDoc(0, "<blip><p>2EFX1XGH0Xabc</p></blip>");
t.checkClientDoc(1, "<blip><p>2EFX1XGH0Xabc</p></blip>");
t.checkClientDoc(2, "<blip><p>2EFX1XGH0Xabc</p></blip>");
// more edits
t.clientDoInsert(1, 3, "+");
t.clientDoInsert(2, 4, "-");
t.serverProcessDeltas();
t.checkClientDoc(0, "<blip><p>2+E-FX1XGH0Xabc</p></blip>");
t.checkClientDoc(1, "<blip><p>2+E-FX1XGH0Xabc</p></blip>");
t.checkClientDoc(2, "<blip><p>2+E-FX1XGH0Xabc</p></blip>");
t.killClient(0);
t.clientDoInsert(0, 2, "?");
// more edits
t.clientDoInsert(1, 4, "+");
t.clientDoInsert(2, 6, "-");
t.serverProcessDeltas();
t.checkClientDoc(0, "<blip><p>?2+E-FX1XGH0Xabc</p></blip>");
t.checkClientDoc(1, "<blip><p>2++E--FX1XGH0Xabc</p></blip>");
t.checkClientDoc(2, "<blip><p>2++E--FX1XGH0Xabc</p></blip>");
// Reconnect client 1
t.reconnectClient(0);
t.serverProcessDeltas();
t.checkClientDoc(0, "<blip><p>?2++E--FX1XGH0Xabc</p></blip>");
t.checkClientDoc(1, "<blip><p>?2++E--FX1XGH0Xabc</p></blip>");
t.checkClientDoc(2, "<blip><p>?2++E--FX1XGH0Xabc</p></blip>");
t.killClient(0);
t.clientDoInsert(0, 3, "?");
t.checkClientDoc(0, "<blip><p>??2++E--FX1XGH0Xabc</p></blip>");
// Reconnect client 1
t.reconnectClient(0);
t.serverProcessDeltas();
t.checkClientDoc(0, "<blip><p>??2++E--FX1XGH0Xabc</p></blip>");
t.checkClientDoc(1, "<blip><p>??2++E--FX1XGH0Xabc</p></blip>");
t.checkClientDoc(2, "<blip><p>??2++E--FX1XGH0Xabc</p></blip>");
}
/**
* Server crashes with 1 client and reset to version 0
*
* The client connects back to an older version
*
* @throws OperationException needed.
* @throws TransformException
*/
public void testRecoveryServerCrash1ClientReset0() throws Exception {
TestConfig t = new TestConfig("<blip><p>abc</p></blip>", 1, false);
t.clientDoInsert(0, 2, "0X").clientDoInsert(0, 4, "1X");
t.serverProcessDeltas();
t.checkClientDoc(0, "<blip><p>0X1Xabc</p></blip>");
t.killClient(0);
t.rebootServer(0);
t.reconnectClient(0);
t.serverProcessDeltas();
t.checkClientDoc(0, "<blip><p>0X1Xabc</p></blip>");
}
/**
* Server crashes with 1 client without reset to version 0
*
* The client connects back to an older version
*
* @throws OperationException needed.
* @throws TransformException
*/
public void testRecoveryServerCrash1Client() throws Exception {
TestConfig t = new TestConfig("<blip><p>abc</p></blip>", 1, true);
t.clientDoInsert(0, 2, "0X").clientDoInsert(0, 4, "1X").clientDoInsert(0, 6, "2X");
t.serverProcessDeltas();
t.checkClientDoc(0, "<blip><p>0X1X2Xabc</p></blip>");
t.killClient(0);
t.rebootServer(1);
t.clientDoInsert(0, 8, "0Y");
t.checkClientDoc(0, "<blip><p>0X1X2X0Yabc</p></blip>");
t.reconnectClient(0);
t.serverProcessDeltas();
t.checkClientDoc(0, "<blip><p>0X1X2X0Yabc</p></blip>");
}
/**
* Server crashes with 2 client
*
* The client connects back to an older version
*
* @throws OperationException needed.
* @throws TransformException
*/
public void testRecoveryServerCrash2Clients() throws Exception {
TestConfig t = new TestConfig("<blip><p>abc</p></blip>", 2, true);
t.clientDoInsert(0, 2, "0X").clientDoInsert(0, 4, "1X");
t.serverProcessDeltas();
t.checkClientDoc(0, "<blip><p>0X1Xabc</p></blip>");
t.checkClientDoc(1, "<blip><p>0X1Xabc</p></blip>");
t.killClient(0);
t.killClient(1);
// Server wakes up at version 1
t.rebootServer(1);
// Clients do more stuff whilst off line
t.clientDoInsert(0, 2, "0Y").clientDoInsert(1, 2, "1Y");
t.reconnectClient(0);
try {
t.reconnectClient(1);
fail("ConnectionFailedException expected");
} catch (ChannelException expected) {
}
// Client 1 dead, since for v1 release we don't support recovery from
// server crash where there are multiple client that are concurrently editing
t.killClient(1);
t.serverProcessDeltas();
t.checkClientDoc(0, "<blip><p>0Y0X1Xabc</p></blip>");
t.checkClientDoc(1, "<blip><p>1Y0X1Xabc</p></blip>");
}
/**
* Test a ghost submit that ended up on the server from a previous client session before
* the client's resubmit.
*/
public void testRecoveryGhostBeforeResubmit() throws Exception {
TestConfig t = new TestConfig("<blip><p>abc</p></blip>", 1, false);
// mimic delta not getting to server
t.ghostClientDeltas(0, true);
t.clientDoInsert(0, 2, "0X").clientDoInsert(0, 4, "1X");
t.checkClientDoc(0, "<blip><p>0X1Xabc</p></blip>");
t.killClient(0);
t.ghostClientDeltas(0, false);
// server now gets client 0's delta from a previous session before client's resend
t.sendGhostDeltas(0);
t.reconnectClient(0);
t.serverProcessDeltas();
t.checkClientDoc(0, "<blip><p>0X1Xabc</p></blip>");
}
/**
* Test a ghost submit that ended up on the server from a previous client session after
* a client's resubmit.
*/
public void testRecoveryGhostAfterResubmit() throws Exception {
TestConfig t = new TestConfig("<blip><p>abc</p></blip>", 1, false);
// mimic delta not getting to server
t.ghostClientDeltas(0, true);
t.clientDoInsert(0, 2, "0X").clientDoInsert(0, 4, "1X");
t.checkClientDoc(0, "<blip><p>0X1Xabc</p></blip>");
t.killClient(0);
t.ghostClientDeltas(0, false);
t.reconnectClient(0);
// server now gets client 0's delta from a previous session after client's resend
t.sendGhostDeltas(0);
t.serverProcessDeltas();
t.checkClientDoc(0, "<blip><p>0X1Xabc</p></blip>");
}
/**
* 1 Client dies and tries to recover, but there is a ghost delta from a previous submit.
*
* The disconnected client send a delta before disconnecting.
*
* @throws OperationException needed.
* @throws TransformException
*/
public void testRecoveryWithGhost() throws Exception {
TestConfig t = new TestConfig("<blip><p>abc</p></blip>", 3, true);
// mimic delta not getting to server for client 0
t.ghostClientDeltas(0, true);
t.clientDoInsert(0, 2, "0X").clientDoInsert(1, 2, "1X").clientDoInsert(2, 2, "2X");
t.serverProcessDeltas();
t.checkClientDoc(0, "<blip><p>0X2X1Xabc</p></blip>");
t.checkClientDoc(1, "<blip><p>2X1Xabc</p></blip>");
t.checkClientDoc(2, "<blip><p>2X1Xabc</p></blip>");
t.killClient(0);
t.ghostClientDeltas(0, false);
t.clientDoInsert(0, 7, "A").clientDoInsert(0, 8, "B");
// lots of concurrent editing without client 0 connected
t.clientDoInsert(1, 2, "E").clientDoInsert(1, 3, "F");
t.clientDoInsert(2, 7, "G").clientDoInsert(2, 8, "H");
t.serverProcessDeltas();
t.checkClientDoc(0, "<blip><p>0X2X1ABXabc</p></blip>");
t.checkClientDoc(1, "<blip><p>EF2X1XaGHbc</p></blip>");
t.checkClientDoc(2, "<blip><p>EF2X1XaGHbc</p></blip>");
// Reconnect client 0
t.reconnectClient(0);
// server now gets client 0's delta from a previous session
t.sendGhostDeltas(0);
t.serverProcessDeltas();
t.serverProcessDeltas();
t.checkClientDoc(0, "<blip><p>0XEF2X1ABXaGHbc</p></blip>");
t.checkClientDoc(1, "<blip><p>0XEF2X1ABXaGHbc</p></blip>");
t.checkClientDoc(2, "<blip><p>0XEF2X1ABXaGHbc</p></blip>");
}
}