/*
* 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.facebook.presto.jdbc;
import com.facebook.presto.jdbc.internal.client.ClientSession;
import com.facebook.presto.jdbc.internal.client.QueryResults;
import com.facebook.presto.jdbc.internal.client.StatementClient;
import com.facebook.presto.jdbc.internal.guava.collect.ImmutableSet;
import com.facebook.presto.jdbc.internal.guava.net.HostAndPort;
import com.facebook.presto.jdbc.internal.airlift.http.client.HttpClient;
import com.facebook.presto.jdbc.internal.airlift.http.client.HttpClientConfig;
import com.facebook.presto.jdbc.internal.airlift.http.client.jetty.JettyHttpClient;
import com.facebook.presto.jdbc.internal.airlift.json.JsonCodec;
import com.facebook.presto.jdbc.internal.airlift.units.Duration;
import javax.annotation.Nullable;
import java.io.Closeable;
import java.net.InetSocketAddress;
import java.net.Proxy;
import java.net.ProxySelector;
import java.net.URI;
import java.util.concurrent.TimeUnit;
import static com.facebook.presto.jdbc.internal.guava.base.Preconditions.checkNotNull;
import static com.facebook.presto.jdbc.internal.airlift.json.JsonCodec.jsonCodec;
class QueryExecutor
implements Closeable
{
private final JsonCodec<QueryResults> queryInfoCodec;
private final HttpClient httpClient;
private QueryExecutor(String userAgent, JsonCodec<QueryResults> queryResultsCodec, HostAndPort socksProxy)
{
checkNotNull(userAgent, "userAgent is null");
checkNotNull(queryResultsCodec, "queryResultsCodec is null");
this.queryInfoCodec = queryResultsCodec;
this.httpClient = new JettyHttpClient(
new HttpClientConfig()
.setConnectTimeout(new Duration(10, TimeUnit.SECONDS))
.setSocksProxy(socksProxy),
ImmutableSet.of(new UserAgentRequestFilter(userAgent)));
}
public StatementClient startQuery(ClientSession session, String query)
{
return new StatementClient(httpClient, queryInfoCodec, session, query);
}
@Override
public void close()
{
httpClient.close();
}
// TODO: replace this with a phantom reference
@SuppressWarnings("FinalizeDeclaration")
@Override
protected void finalize()
{
close();
}
static QueryExecutor create(String userAgent)
{
return new QueryExecutor(userAgent, jsonCodec(QueryResults.class), getSystemSocksProxy());
}
@Nullable
private static HostAndPort getSystemSocksProxy()
{
URI uri = URI.create("socket://0.0.0.0:80");
for (Proxy proxy : ProxySelector.getDefault().select(uri)) {
if (proxy.type() == Proxy.Type.SOCKS) {
if (proxy.address() instanceof InetSocketAddress) {
InetSocketAddress address = (InetSocketAddress) proxy.address();
return HostAndPort.fromParts(address.getHostString(), address.getPort());
}
}
}
return null;
}
}