/*
* Copyright (C) 2012-2015 DataStax 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 com.datastax.driver.core;
import com.datastax.driver.core.exceptions.CoordinatorException;
import com.google.common.util.concurrent.ListenableFuture;
import com.google.common.util.concurrent.Uninterruptibles;
import org.assertj.core.util.Maps;
import java.net.InetAddress;
import java.net.InetSocketAddress;
import java.util.List;
import java.util.Map;
import java.util.concurrent.ExecutionException;
import java.util.concurrent.TimeUnit;
import static com.google.common.collect.Lists.newArrayList;
import static org.assertj.core.api.Assertions.assertThat;
import static org.testng.Assert.fail;
/**
* A convenience utility for executing queries against a {@link Session} and tracking
* which hosts were queried.
*/
public class QueryTracker {
public static final String QUERY = "select * from test.foo";
Map<InetAddress, Integer> coordinators = Maps.newConcurrentHashMap();
public void query(Session session, int times) {
query(session, times, ConsistencyLevel.ONE);
}
public void query(Session session, int times, ConsistencyLevel cl) {
query(session, times, cl, null);
}
public void query(Session session, int times, InetSocketAddress expectedHost) {
query(session, times, new SimpleStatement(QUERY), null, expectedHost);
}
public void query(Session session, int times, Class<? extends Exception> expectedException, InetSocketAddress expectedHost) {
query(session, times, new SimpleStatement(QUERY), expectedException, expectedHost);
}
public void query(Session session, int times, ConsistencyLevel cl, Class<? extends Exception> expectedException) {
Statement statement = new SimpleStatement(QUERY);
if (cl != null) {
statement.setConsistencyLevel(cl);
}
query(session, times, statement, expectedException, null);
}
public void query(Session session, int times, Statement statement) {
query(session, times, statement, null, null);
}
public void query(Session session, int times, Statement statement, Class<? extends Exception> expectedException, InetSocketAddress expectedHost) {
List<ListenableFuture<ResultSet>> futures = newArrayList();
for (int i = 0; i < times; i++) {
futures.add(session.executeAsync(statement));
}
try {
for (ListenableFuture<ResultSet> future : futures) {
try {
ResultSet result = Uninterruptibles.getUninterruptibly(future, 1, TimeUnit.SECONDS);
InetSocketAddress address = result.getExecutionInfo().getQueriedHost().getSocketAddress();
InetAddress coordinator = address.getAddress();
Integer n = coordinators.get(coordinator);
coordinators.put(coordinator, n == null ? 1 : n + 1);
if (expectedHost != null) {
assertThat(address).isEqualTo(expectedHost);
}
} catch (ExecutionException ex) {
Throwable cause = ex.getCause();
if (expectedException == null) {
fail("Query fail", ex);
} else {
assertThat(cause).isInstanceOf(expectedException);
}
if (cause instanceof CoordinatorException) {
assertThat(((CoordinatorException) cause).getAddress()).isEqualTo(expectedHost);
}
}
}
} catch (Exception e) {
fail("Queries failed", e);
}
}
public int queryCount(ScassandraCluster sCluster, int dc, int node) {
try {
InetSocketAddress host = sCluster.address(dc, node);
Integer queried = coordinators.get(host.getAddress());
return queried != null ? queried : 0;
} catch (Exception e) {
throw new RuntimeException(e);
}
}
public void assertQueried(ScassandraCluster sCluster, int dc, int node, int n) {
int queryCount = queryCount(sCluster, dc, node);
assertThat(queryCount)
.as("Expected node %d:%d to be queried %d times but was %d", dc, node, n, queryCount)
.isEqualTo(n);
}
public void reset() {
this.coordinators.clear();
}
}