/*
* 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.verifier;
import com.fasterxml.jackson.core.JsonEncoding;
import com.fasterxml.jackson.core.JsonFactory;
import com.fasterxml.jackson.core.JsonGenerator;
import com.google.common.base.Throwables;
import io.airlift.event.client.AbstractEventClient;
import io.airlift.event.client.JsonEventSerializer;
import java.io.ByteArrayOutputStream;
import java.io.IOException;
import java.io.PrintStream;
import static com.google.common.base.Preconditions.checkNotNull;
public class JsonEventClient
extends AbstractEventClient
{
// TODO we should use JsonEventWriter instead
private final JsonEventSerializer serializer = new JsonEventSerializer(VerifierQueryEvent.class);
private final JsonFactory factory = new JsonFactory();
private final PrintStream out;
public JsonEventClient(PrintStream out)
{
this.out = checkNotNull(out, "out is null");
}
@Override
public <T> void postEvent(T event)
throws IOException
{
try {
ByteArrayOutputStream buffer = new ByteArrayOutputStream();
JsonGenerator generator = factory.createGenerator(buffer, JsonEncoding.UTF8);
serializer.serialize(event, generator);
out.println(buffer.toString().trim());
}
catch (IOException e) {
throw Throwables.propagate(e);
}
}
}