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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.runtime;
import org.apache.kafka.common.config.ConfigDef;
import org.apache.kafka.common.config.ConfigDef.Importance;
import org.apache.kafka.common.config.ConfigException;
import org.apache.kafka.connect.runtime.isolation.Plugins;
import org.apache.kafka.connect.sink.SinkTask;
import org.apache.kafka.connect.transforms.util.RegexValidator;
import java.util.Map;
/**
* Configuration needed for all sink connectors
*/
public class SinkConnectorConfig extends ConnectorConfig {
public static final String TOPICS_CONFIG = SinkTask.TOPICS_CONFIG;
private static final String TOPICS_DOC = "List of topics to consume, separated by commas";
public static final String TOPICS_DEFAULT = "";
private static final String TOPICS_DISPLAY = "Topics";
public static final String TOPICS_REGEX_CONFIG = SinkTask.TOPICS_REGEX_CONFIG;
private static final String TOPICS_REGEX_DOC = "Regular expression giving topics to consume. " +
"Under the hood, the regex is compiled to a java.util.regex.Pattern. " +
"Only one of " + TOPICS_CONFIG + " or " + TOPICS_REGEX_CONFIG + " should be specified.";
public static final String TOPICS_REGEX_DEFAULT = "";
private static final String TOPICS_REGEX_DISPLAY = "Topics regex";
public static final String DLQ_PREFIX = "errors.deadletterqueue.";
public static final String DLQ_TOPIC_NAME_CONFIG = DLQ_PREFIX + "topic.name";
public static final String DLQ_TOPIC_NAME_DOC = "The name of the topic to be used as the dead letter queue (DLQ) for messages that " +
"result in an error when processed by this sink connector, or its transformations or converters. The topic name is blank by default, " +
"which means that no messages are to be recorded in the DLQ.";
public static final String DLQ_TOPIC_DEFAULT = "";
private static final String DLQ_TOPIC_DISPLAY = "Dead Letter Queue Topic Name";
public static final String DLQ_TOPIC_REPLICATION_FACTOR_CONFIG = DLQ_PREFIX + "topic.replication.factor";
private static final String DLQ_TOPIC_REPLICATION_FACTOR_CONFIG_DOC = "Replication factor used to create the dead letter queue topic when it doesn't already exist.";
public static final short DLQ_TOPIC_REPLICATION_FACTOR_CONFIG_DEFAULT = 3;
private static final String DLQ_TOPIC_REPLICATION_FACTOR_CONFIG_DISPLAY = "Dead Letter Queue Topic Replication Factor";
public static final String DLQ_CONTEXT_HEADERS_ENABLE_CONFIG = DLQ_PREFIX + "context.headers.enable";
public static final boolean DLQ_CONTEXT_HEADERS_ENABLE_DEFAULT = false;
public static final String DLQ_CONTEXT_HEADERS_ENABLE_DOC = "If true, add headers containing error context to the messages " +
"written to the dead letter queue. To avoid clashing with headers from the original record, all error context header " +
"keys, all error context header keys will start with __connect.errors.";
private static final String DLQ_CONTEXT_HEADERS_ENABLE_DISPLAY = "Enable Error Context Headers";
static ConfigDef config = ConnectorConfig.configDef()
.define(TOPICS_CONFIG, ConfigDef.Type.LIST, TOPICS_DEFAULT, ConfigDef.Importance.HIGH, TOPICS_DOC, COMMON_GROUP, 4, ConfigDef.Width.LONG, TOPICS_DISPLAY)
.define(TOPICS_REGEX_CONFIG, ConfigDef.Type.STRING, TOPICS_REGEX_DEFAULT, new RegexValidator(), ConfigDef.Importance.HIGH, TOPICS_REGEX_DOC, COMMON_GROUP, 4, ConfigDef.Width.LONG, TOPICS_REGEX_DISPLAY)
.define(DLQ_TOPIC_NAME_CONFIG, ConfigDef.Type.STRING, DLQ_TOPIC_DEFAULT, Importance.MEDIUM, DLQ_TOPIC_NAME_DOC, ERROR_GROUP, 6, ConfigDef.Width.MEDIUM, DLQ_TOPIC_DISPLAY)
.define(DLQ_TOPIC_REPLICATION_FACTOR_CONFIG, ConfigDef.Type.SHORT, DLQ_TOPIC_REPLICATION_FACTOR_CONFIG_DEFAULT, Importance.MEDIUM, DLQ_TOPIC_REPLICATION_FACTOR_CONFIG_DOC, ERROR_GROUP, 7, ConfigDef.Width.MEDIUM, DLQ_TOPIC_REPLICATION_FACTOR_CONFIG_DISPLAY)
.define(DLQ_CONTEXT_HEADERS_ENABLE_CONFIG, ConfigDef.Type.BOOLEAN, DLQ_CONTEXT_HEADERS_ENABLE_DEFAULT, Importance.MEDIUM, DLQ_CONTEXT_HEADERS_ENABLE_DOC, ERROR_GROUP, 8, ConfigDef.Width.MEDIUM, DLQ_CONTEXT_HEADERS_ENABLE_DISPLAY);
public static ConfigDef configDef() {
return config;
}
public SinkConnectorConfig(Plugins plugins, Map props) {
super(plugins, config, props);
}
/**
* Throw an exception if the passed-in properties do not constitute a valid sink.
* @param props sink configuration properties
*/
public static void validate(Map props) {
final boolean hasTopicsConfig = hasTopicsConfig(props);
final boolean hasTopicsRegexConfig = hasTopicsRegexConfig(props);
if (hasTopicsConfig && hasTopicsRegexConfig) {
throw new ConfigException(SinkTask.TOPICS_CONFIG + " and " + SinkTask.TOPICS_REGEX_CONFIG +
" are mutually exclusive options, but both are set.");
}
if (!hasTopicsConfig && !hasTopicsRegexConfig) {
throw new ConfigException("Must configure one of " +
SinkTask.TOPICS_CONFIG + " or " + SinkTask.TOPICS_REGEX_CONFIG);
}
}
public static boolean hasTopicsConfig(Map props) {
String topicsStr = props.get(TOPICS_CONFIG);
return topicsStr != null && !topicsStr.trim().isEmpty();
}
public static boolean hasTopicsRegexConfig(Map props) {
String topicsRegexStr = props.get(TOPICS_REGEX_CONFIG);
return topicsRegexStr != null && !topicsRegexStr.trim().isEmpty();
}
public String dlqTopicName() {
return getString(DLQ_TOPIC_NAME_CONFIG);
}
public short dlqTopicReplicationFactor() {
return getShort(DLQ_TOPIC_REPLICATION_FACTOR_CONFIG);
}
public boolean isDlqContextHeadersEnabled() {
return getBoolean(DLQ_CONTEXT_HEADERS_ENABLE_CONFIG);
}
public static void main(String[] args) {
System.out.println(config.toHtmlTable());
}
}
