/**
* Licensed to the Apache Software Foundation (ASF) under one or more
* contributor license agreements. See the NOTICE file distributed with
* this work for additional information regarding copyright ownership.
* The ASF licenses this file to You 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.apache.camel.component.couchdb;
import com.google.gson.Gson;
import com.google.gson.JsonElement;
import com.google.gson.JsonObject;
import org.apache.camel.Exchange;
import org.apache.camel.InvalidPayloadException;
import org.apache.camel.impl.DefaultProducer;
import org.lightcouch.Response;
public class CouchDbProducer extends DefaultProducer {
private final CouchDbClientWrapper couchClient;
public CouchDbProducer(CouchDbEndpoint endpoint, CouchDbClientWrapper couchClient) {
super(endpoint);
this.couchClient = couchClient;
}
@Override
public void process(Exchange exchange) throws Exception {
JsonElement json = getBodyAsJsonElement(exchange);
Response save = saveJsonElement(json);
if (save == null) {
throw new CouchDbException("Could not save document [unknown reason]", exchange);
}
if (log.isTraceEnabled()) {
log.trace("Document saved [_id={}, _rev={}]", save.getId(), save.getRev());
}
exchange.getIn().setHeader(CouchDbConstants.HEADER_DOC_REV, save.getRev());
exchange.getIn().setHeader(CouchDbConstants.HEADER_DOC_ID, save.getId());
}
JsonElement getBodyAsJsonElement(Exchange exchange) throws InvalidPayloadException {
Object body = exchange.getIn().getMandatoryBody();
if (body instanceof String) {
return new Gson().toJsonTree(body);
} else if (body instanceof JsonElement) {
return (JsonElement) body;
} else {
throw new InvalidPayloadException(exchange, body != null ? body.getClass() : null);
}
}
private Response saveJsonElement(JsonElement json) {
Response save;
if (json instanceof JsonObject) {
JsonObject obj = (JsonObject) json;
if (obj.get("_rev") == null) {
save = couchClient.save(json);
} else {
save = couchClient.update(json);
}
} else {
save = couchClient.save(json);
}
return save;
}
}