/*
* Copyright (c) 2015, WSO2 Inc. (http://www.wso2.org) All Rights Reserved.
*
* WSO2 Inc. 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.wso2.carbon.event.input.adapter.mqtt;
import org.wso2.carbon.context.PrivilegedCarbonContext;
import org.wso2.carbon.event.input.adapter.core.InputEventAdapter;
import org.wso2.carbon.event.input.adapter.core.InputEventAdapterConfiguration;
import org.wso2.carbon.event.input.adapter.core.InputEventAdapterListener;
import org.wso2.carbon.event.input.adapter.core.exception.InputEventAdapterException;
import org.wso2.carbon.event.input.adapter.core.exception.TestConnectionNotSupportedException;
import org.wso2.carbon.event.input.adapter.mqtt.internal.util.MQTTAdapterListener;
import org.wso2.carbon.event.input.adapter.mqtt.internal.util.MQTTBrokerConnectionConfiguration;
import org.wso2.carbon.event.input.adapter.mqtt.internal.util.MQTTEventAdapterConstants;
import java.util.Map;
import java.util.UUID;
/**
* Input MQTTEventAdapter will be used to receive events with MQTT protocol using specified broker and topic.
*/
public class MQTTEventAdapter implements InputEventAdapter {
private final InputEventAdapterConfiguration eventAdapterConfiguration;
private InputEventAdapterListener eventAdapterListener;
private final Map<String, String> globalProperties;
private final String id = UUID.randomUUID().toString();
private MQTTAdapterListener mqttAdapterListener;
private MQTTBrokerConnectionConfiguration mqttBrokerConnectionConfiguration;
public MQTTEventAdapter(InputEventAdapterConfiguration eventAdapterConfiguration,
Map<String, String> globalProperties) {
this.eventAdapterConfiguration = eventAdapterConfiguration;
this.globalProperties = globalProperties;
}
@Override
public void init(InputEventAdapterListener eventAdapterListener) throws InputEventAdapterException {
this.eventAdapterListener = eventAdapterListener;
try {
int keepAlive;
//If global properties are available those will be assigned else constant values will be assigned
if (globalProperties.get(MQTTEventAdapterConstants.ADAPTER_CONF_KEEP_ALIVE) != null) {
keepAlive = Integer.parseInt((globalProperties.get(MQTTEventAdapterConstants.ADAPTER_CONF_KEEP_ALIVE)));
} else {
keepAlive = MQTTEventAdapterConstants.ADAPTER_CONF_DEFAULT_KEEP_ALIVE;
}
mqttBrokerConnectionConfiguration = new MQTTBrokerConnectionConfiguration(
eventAdapterConfiguration.getProperties().get(MQTTEventAdapterConstants.ADAPTER_CONF_URL),
eventAdapterConfiguration.getProperties().get(MQTTEventAdapterConstants.ADAPTER_CONF_USERNAME),
eventAdapterConfiguration.getProperties().get(MQTTEventAdapterConstants.ADAPTER_CONF_PASSWORD),
eventAdapterConfiguration.getProperties().get(MQTTEventAdapterConstants.ADAPTER_CONF_CLEAN_SESSION),
String.valueOf(keepAlive));
mqttAdapterListener = new MQTTAdapterListener(mqttBrokerConnectionConfiguration,
eventAdapterConfiguration.getProperties().get(MQTTEventAdapterConstants.ADAPTER_MESSAGE_TOPIC),
eventAdapterConfiguration.getProperties().get(MQTTEventAdapterConstants.ADAPTER_CONF_CLIENTID),
eventAdapterListener, PrivilegedCarbonContext.getThreadLocalCarbonContext().getTenantId());
} catch (Throwable t) {
throw new InputEventAdapterException(t.getMessage(), t);
}
}
@Override
public void testConnect() throws TestConnectionNotSupportedException {
throw new TestConnectionNotSupportedException("not-supported");
}
@Override
public void connect() {
mqttAdapterListener.createConnection();
}
@Override
public void disconnect() {
if (mqttAdapterListener != null) {
mqttAdapterListener.stopListener(eventAdapterConfiguration.getName());
}
}
@Override
public void destroy() {
}
@Override
public boolean equals(Object o) {
if (this == o) return true;
if (!(o instanceof MQTTEventAdapter)) return false;
MQTTEventAdapter that = (MQTTEventAdapter) o;
if (!id.equals(that.id)) return false;
return true;
}
@Override
public int hashCode() {
return id.hashCode();
}
@Override
public boolean isEventDuplicatedInCluster() {
return true;
}
@Override
public boolean isPolling() {
return true;
}
}