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// Copyright 2019 Oath Inc. Licensed under the terms of the Apache 2.0 license. See LICENSE in the project root.
package com.yahoo.restapi;
import com.fasterxml.jackson.databind.ObjectMapper;
import com.fasterxml.jackson.datatype.jdk8.Jdk8Module;
import com.fasterxml.jackson.datatype.jsr310.JavaTimeModule;
import com.yahoo.container.jdisc.HttpResponse;
import java.util.logging.Level;
import java.io.IOException;
import java.io.OutputStream;
import java.util.logging.Logger;
/**
* A JSON response using Jackson for serialization.
*
* @author bjorncs
*/
public class JacksonJsonResponse<T> extends HttpResponse {
private static final Logger log = Logger.getLogger(JacksonJsonResponse.class.getName());
private static final ObjectMapper defaultJsonMapper = new ObjectMapper()
.registerModule(new JavaTimeModule()).registerModule(new Jdk8Module());
private final ObjectMapper jsonMapper;
private final T entity;
public JacksonJsonResponse(int statusCode, T entity) {
this(statusCode, entity, defaultJsonMapper);
}
public JacksonJsonResponse(int statusCode, T entity, ObjectMapper jsonMapper) {
super(statusCode);
this.entity = entity;
this.jsonMapper = jsonMapper;
}
@Override
public void render(OutputStream outputStream) throws IOException {
if (log.isLoggable(LogLevel.DEBUG)) {
String json = jsonMapper.writeValueAsString(entity);
log.log(LogLevel.DEBUG, "Writing the following JSON to response output stream:\n" + json);
outputStream.write(json.getBytes());
} else {
jsonMapper.writeValue(outputStream, entity);
}
}
@Override public String getContentType() { return "application/json"; }
public T getEntity() { return entity; }
}
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