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Camel Yammer Component
There is a newer version: 3.16.0
/*
 * 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.yammer;

import java.net.URLEncoder;

import com.fasterxml.jackson.databind.ObjectMapper;
import org.apache.camel.Exchange;
import org.apache.camel.component.yammer.model.Messages;
import org.apache.camel.support.DefaultProducer;

public class YammerMessageProducer extends DefaultProducer {

    private final YammerEndpoint endpoint;
    private final String apiUrl;
    private ApiRequestor requestor;

    public YammerMessageProducer(YammerEndpoint endpoint) throws Exception {
        super(endpoint);
        this.endpoint = endpoint;
        this.apiUrl = getApiUrl();
    }

    private String getApiUrl() throws Exception {
        StringBuilder url = new StringBuilder();

        switch (endpoint.getConfig().getFunction()) {
            case MESSAGES:
                url.append(YammerConstants.YAMMER_BASE_API_URL);
                url.append(endpoint.getConfig().getFunction().name().toLowerCase());
                url.append(".json");
                break;
            default:
                throw new Exception(
                        String.format("%s is not a valid Yammer message producer function type.",
                                endpoint.getConfig().getFunction().name()));
        }

        return url.toString();
    }

    @Override
    public void process(Exchange exchange) throws Exception {
        String body = exchange.getIn().getBody(String.class);

        String jsonBody = requestor.post("?body=" + URLEncoder.encode(body, "UTF-8"));

        // we set the body to the message that was created on the server
        if (!endpoint.getConfig().isUseJson()) {
            ObjectMapper jsonMapper = new ObjectMapper();
            Messages messages = jsonMapper.readValue(jsonBody, Messages.class);
            exchange.getIn().setBody(messages);
        } else {
            exchange.getIn().setBody(jsonBody);
        }
    }

    @Override
    protected void doStart() throws Exception {
        super.doStart();
        if (requestor == null) {
            requestor = endpoint.getConfig().getRequestor();
        }
        if (requestor == null) {
            requestor = new ScribeApiRequestor(apiUrl, endpoint.getConfig().getAccessToken());
        }
    }
}