org.apache.kafka.connect.storage.ConfigBackingStore Maven / Gradle / Ivy
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* 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.kafka.connect.storage;
import org.apache.kafka.connect.runtime.TargetState;
import org.apache.kafka.connect.runtime.distributed.ClusterConfigState;
import org.apache.kafka.connect.util.ConnectorTaskId;
import java.util.Collection;
import java.util.List;
import java.util.Map;
import java.util.concurrent.TimeUnit;
import java.util.concurrent.TimeoutException;
public interface ConfigBackingStore {
void start();
void stop();
/**
* Get a snapshot of the current configuration state including all connector and task
* configurations.
* @return the cluster config state
*/
ClusterConfigState snapshot();
/**
* Check if the store has configuration for a connector.
* @param connector name of the connector
* @return true if the backing store contains configuration for the connector
*/
boolean contains(String connector);
/**
* Update the configuration for a connector.
* @param connector name of the connector
* @param properties the connector configuration
*/
void putConnectorConfig(String connector, Map properties);
/**
* Remove configuration for a connector
* @param connector name of the connector
*/
void removeConnectorConfig(String connector);
/**
* Update the task configurations for a connector.
* @param connector name of the connector
* @param configs the new task configs for the connector
*/
void putTaskConfigs(String connector, List> configs);
/**
* Remove the task configs associated with a connector.
* @param connector name of the connector
*/
void removeTaskConfigs(String connector);
/**
* Refresh the backing store. This forces the store to ensure that it has the latest
* configs that have been written.
* @param timeout max time to wait for the refresh to complete
* @param unit unit of timeout
* @throws TimeoutException if the timeout expires before the refresh has completed
*/
void refresh(long timeout, TimeUnit unit) throws TimeoutException;
/**
* Transition a connector to a new target state (e.g. paused).
* @param connector name of the connector
* @param state the state to transition to
*/
void putTargetState(String connector, TargetState state);
/**
* Set an update listener to get notifications when there are config/target state
* changes.
* @param listener non-null listener
*/
void setUpdateListener(UpdateListener listener);
interface UpdateListener {
/**
* Invoked when a connector configuration has been removed
* @param connector name of the connector
*/
void onConnectorConfigRemove(String connector);
/**
* Invoked when a connector configuration has been updated.
* @param connector name of the connector
*/
void onConnectorConfigUpdate(String connector);
/**
* Invoked when task configs are updated.
* @param tasks all the tasks whose configs have been updated
*/
void onTaskConfigUpdate(Collection tasks);
/**
* Invoked when the user has set a new target state (e.g. paused)
* @param connector name of the connector
*/
void onConnectorTargetStateChange(String connector);
}
}