org.bin01.db.verifier.JsonEventClient.java Source code

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Here is the source code for org.bin01.db.verifier.JsonEventClient.java

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/*
 * 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.bin01.db.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 {
    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);
        }
    }
}