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/**
* Copyright 2012 Kjetil Ørbekk <kjetil.orbekk@gmail.com>
*
* 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 com.orbekk.same;
import static org.hamcrest.MatcherAssert.assertThat;
import static org.hamcrest.Matchers.hasItem;
import static org.hamcrest.Matchers.is;
import java.util.ArrayList;
import java.util.List;
import java.util.concurrent.CountDownLatch;
import java.util.concurrent.ExecutorService;
import java.util.concurrent.Executors;
import org.junit.Before;
import org.junit.Ignore;
import org.junit.Test;
import com.orbekk.paxos.PaxosServiceImpl;
import com.orbekk.protobuf.Rpc;
import com.orbekk.util.DelayedOperation;
/** A functional test that runs with a master and several clients. */
public class FunctionalTest {
ExecutorService executor;
Master master;
String masterUrl = "http://master/MasterService.json";
String masterLocation = "master:1";
Client client1;
Client client2;
Client client3;
VariableFactory vf1;
VariableFactory vf2;
VariableFactory vf3;
List<Client> clients = new ArrayList<Client>();
TestConnectionManager connections = new TestConnectionManager();
RpcFactory rpcf = new RpcFactory(5000) {
@Override public Rpc create() {
Rpc rpc = super.create();
rpc.complete();
return rpc;
};
};
/** Works with a single thread executor. */
public void awaitExecution() throws InterruptedException {
final CountDownLatch finished = new CountDownLatch(1);
Runnable sendFinished = new Runnable() {
@Override public void run() {
finished.countDown();
}
};
executor.execute(sendFinished);
finished.await();
}
@Before public void setUp() {
master = Master.create(connections,
masterUrl, "TestMaster", masterLocation, rpcf);
connections.masterMap0.put(masterLocation, master.getNewService());
client1 = newClient("TestClient1", "http://client1/ClientService.json",
"client1");
vf1 = new VariableFactory(client1.getInterface());
client2 = newClient("TestClient2", "http://client2/ClientService.json",
"client2");
vf2 = new VariableFactory(client2.getInterface());
client3 = newClient("TestClient3", "http://client3/ClientService.json",
"client3");
vf3 = new VariableFactory(client3.getInterface());
}
Client newClient(String clientName, String clientUrl, String location) {
Client client = new Client(new State(), connections,
clientUrl, location, rpcf);
connections.clientMap0.put(location, client.getNewService());
clients.add(client);
String paxosUrl = clientUrl.replace("ClientService", "PaxosService");
PaxosServiceImpl paxos = new PaxosServiceImpl(paxosUrl);
connections.paxosMap0.put(location, paxos.getService());
return client;
}
void performWork() {
for (int i = 0; i < 2; i++) {
master.performWork();
for (Client c : clients) {
c.performWork();
}
}
}
void joinClients() {
for (Client c : clients) {
c.joinNetwork(master.getMasterInfo());
}
performWork();
}
List<State> getStates() {
List<State> states = new ArrayList<State>();
states.add(master.state);
for (Client c : clients) {
states.add(c.state);
}
return states;
}
@Test public void testJoin() {
joinClients();
for (State s : getStates()) {
List<String> participants = s.getList(State.PARTICIPANTS);
assertThat(participants, hasItem("client1"));
assertThat(participants, hasItem("client2"));
assertThat(participants, hasItem("client3"));
}
for (Client c : clients) {
assertThat(c.getConnectionState(), is(ConnectionState.STABLE));
assertThat(c.getMaster().getMasterLocation(), is(masterLocation));
}
}
@Test public void setState() {
joinClients();
Variable<String> x1 = vf1.createString("x");
Variable<String> x2 = vf2.createString("x");
x1.set("TestValue1");
performWork();
x1.update();
x2.update();
assertThat(x1.get(), is("TestValue1"));
assertThat(x2.get(), is("TestValue1"));
}
@Ignore
@Test public void clientBecomesMaster() throws Exception {
String newMasterUrl = "http://newMaster/MasterService.json";
String newMasterLocation = "newMaster:1";
final Master newMaster = Master.create(connections,
newMasterUrl, "TestMaster", newMasterLocation, rpcf);
joinClients();
MasterController controller = new MasterController() {
@Override
public void enableMaster(String networkName, State lastKnownState, int masterId) {
newMaster.resumeFrom(lastKnownState, masterId);
}
@Override
public void disableMaster() {
}
};
client1.setMasterController(controller);
client2.setMasterController(controller);
client3.setMasterController(controller);
client1.startMasterElection(master.getMasterInfo());
awaitExecution();
newMaster.performWork();
assertThat(client1.getMaster().getMasterLocation(), is(newMasterLocation));
assertThat(client2.getMaster().getMasterLocation(), is(newMasterLocation));
}
@Ignore
@Test public void onlyOneNewMaster() throws Exception {
String newMasterLocation = "newMaster:1";
final Master newMaster = Master.create(connections,
"NetworkName", "TestMaster", newMasterLocation, rpcf);
joinClients();
MasterController controller = new MasterController() {
boolean firstMaster = true;
@Override
public synchronized void enableMaster(String networkName, State lastKnownState,
int masterId) {
assertThat(firstMaster, is(true));
newMaster.resumeFrom(lastKnownState, masterId);
firstMaster = false;
}
@Override
public void disableMaster() {
}
};
client1.setMasterController(controller);
client2.setMasterController(controller);
client3.setMasterController(controller);
client1.startMasterElection(master.getMasterInfo());
awaitExecution();
newMaster.performWork();
assertThat(client2.getMaster().getMasterLocation(), is(newMasterLocation));
}
@Ignore
@Test public void masterFails() throws Exception {
String newMasterUrl = "http://newMaster/MasterService.json";
String newMasterLocation = "newMaster:2";
final Master newMaster = Master.create(connections,
newMasterUrl, "TestMaster", newMasterLocation, rpcf);
joinClients();
MasterController controller = new MasterController() {
@Override
public synchronized void enableMaster(String networkName, State lastKnownState,
int masterId) {
newMaster.resumeFrom(lastKnownState, masterId);
}
@Override
public void disableMaster() {
}
};
client1.setMasterController(controller);
client2.setMasterController(controller);
client3.setMasterController(controller);
Variable<String> x1 = vf1.createString("TestMasterFailure");
connections.masterMap0.put(masterLocation, null);
assertThat(x1.set("Woop, woop").getStatus().getStatusCode(),
is(DelayedOperation.Status.ERROR));
awaitExecution();
performWork();
newMaster.performWork();
assertThat(client1.getMaster().getMasterLocation(), is(newMasterLocation));
assertThat(client2.getMaster().getMasterLocation(), is(newMasterLocation));
}
}
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