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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.clients.ClientDnsLookup;
import org.apache.kafka.clients.CommonClientConfigs;
import org.apache.kafka.common.config.AbstractConfig;
import org.apache.kafka.common.config.ConfigDef;
import org.apache.kafka.common.config.ConfigDef.Importance;
import org.apache.kafka.common.config.ConfigDef.Type;
import org.apache.kafka.common.config.internals.BrokerSecurityConfigs;
import org.apache.kafka.common.metrics.Sensor;
import org.apache.kafka.connect.json.JsonConverter;
import org.apache.kafka.connect.json.JsonConverterConfig;
import org.apache.kafka.connect.storage.Converter;
import org.apache.kafka.connect.storage.SimpleHeaderConverter;
import org.slf4j.Logger;
import org.slf4j.LoggerFactory;
import java.util.ArrayList;
import java.util.Arrays;
import java.util.Collections;
import java.util.List;
import java.util.Map;
import java.util.regex.Pattern;
import static org.apache.kafka.common.config.ConfigDef.Range.atLeast;
import static org.apache.kafka.common.config.ConfigDef.ValidString.in;
/**
* Common base class providing configuration for Kafka Connect workers, whether standalone or distributed.
*/
public class WorkerConfig extends AbstractConfig {
private static final Logger log = LoggerFactory.getLogger(WorkerConfig.class);
private static final Pattern COMMA_WITH_WHITESPACE = Pattern.compile("\\s*,\\s*");
public static final String BOOTSTRAP_SERVERS_CONFIG = "bootstrap.servers";
public static final String BOOTSTRAP_SERVERS_DOC
= "A list of host/port pairs to use for establishing the initial connection to the Kafka "
+ "cluster. The client will make use of all servers irrespective of which servers are "
+ "specified here for bootstrapping—this list only impacts the initial hosts used "
+ "to discover the full set of servers. This list should be in the form "
+ "host1:port1,host2:port2,.... Since these servers are just used for the "
+ "initial connection to discover the full cluster membership (which may change "
+ "dynamically), this list need not contain the full set of servers (you may want more "
+ "than one, though, in case a server is down).";
public static final String BOOTSTRAP_SERVERS_DEFAULT = "localhost:9092";
public static final String CLIENT_DNS_LOOKUP_CONFIG = CommonClientConfigs.CLIENT_DNS_LOOKUP_CONFIG;
public static final String CLIENT_DNS_LOOKUP_DOC = CommonClientConfigs.CLIENT_DNS_LOOKUP_DOC;
public static final String KEY_CONVERTER_CLASS_CONFIG = "key.converter";
public static final String KEY_CONVERTER_CLASS_DOC =
"Converter class used to convert between Kafka Connect format and the serialized form that is written to Kafka." +
" This controls the format of the keys in messages written to or read from Kafka, and since this is" +
" independent of connectors it allows any connector to work with any serialization format." +
" Examples of common formats include JSON and Avro.";
public static final String VALUE_CONVERTER_CLASS_CONFIG = "value.converter";
public static final String VALUE_CONVERTER_CLASS_DOC =
"Converter class used to convert between Kafka Connect format and the serialized form that is written to Kafka." +
" This controls the format of the values in messages written to or read from Kafka, and since this is" +
" independent of connectors it allows any connector to work with any serialization format." +
" Examples of common formats include JSON and Avro.";
public static final String HEADER_CONVERTER_CLASS_CONFIG = "header.converter";
public static final String HEADER_CONVERTER_CLASS_DOC =
"HeaderConverter class used to convert between Kafka Connect format and the serialized form that is written to Kafka." +
" This controls the format of the header values in messages written to or read from Kafka, and since this is" +
" independent of connectors it allows any connector to work with any serialization format." +
" Examples of common formats include JSON and Avro. By default, the SimpleHeaderConverter is used to serialize" +
" header values to strings and deserialize them by inferring the schemas.";
public static final String HEADER_CONVERTER_CLASS_DEFAULT = SimpleHeaderConverter.class.getName();
/**
* @deprecated As of 2.0.0
*/
@Deprecated
public static final String INTERNAL_KEY_CONVERTER_CLASS_CONFIG = "internal.key.converter";
public static final String INTERNAL_KEY_CONVERTER_CLASS_DOC =
"Converter class used to convert between Kafka Connect format and the serialized form that is written to Kafka." +
" This controls the format of the keys in messages written to or read from Kafka, and since this is" +
" independent of connectors it allows any connector to work with any serialization format." +
" Examples of common formats include JSON and Avro." +
" This setting controls the format used for internal bookkeeping data used by the framework, such as" +
" configs and offsets, so users can typically use any functioning Converter implementation." +
" Deprecated; will be removed in an upcoming version.";
/**
* @deprecated As of 2.0.0
*/
@Deprecated
public static final String INTERNAL_VALUE_CONVERTER_CLASS_CONFIG = "internal.value.converter";
public static final String INTERNAL_VALUE_CONVERTER_CLASS_DOC =
"Converter class used to convert between Kafka Connect format and the serialized form that is written to Kafka." +
" This controls the format of the values in messages written to or read from Kafka, and since this is" +
" independent of connectors it allows any connector to work with any serialization format." +
" Examples of common formats include JSON and Avro." +
" This setting controls the format used for internal bookkeeping data used by the framework, such as" +
" configs and offsets, so users can typically use any functioning Converter implementation." +
" Deprecated; will be removed in an upcoming version.";
private static final Class INTERNAL_CONVERTER_DEFAULT = JsonConverter.class;
public static final String TASK_SHUTDOWN_GRACEFUL_TIMEOUT_MS_CONFIG
= "task.shutdown.graceful.timeout.ms";
private static final String TASK_SHUTDOWN_GRACEFUL_TIMEOUT_MS_DOC =
"Amount of time to wait for tasks to shutdown gracefully. This is the total amount of time,"
+ " not per task. All task have shutdown triggered, then they are waited on sequentially.";
private static final String TASK_SHUTDOWN_GRACEFUL_TIMEOUT_MS_DEFAULT = "5000";
public static final String OFFSET_COMMIT_INTERVAL_MS_CONFIG = "offset.flush.interval.ms";
private static final String OFFSET_COMMIT_INTERVAL_MS_DOC
= "Interval at which to try committing offsets for tasks.";
public static final long OFFSET_COMMIT_INTERVAL_MS_DEFAULT = 60000L;
public static final String OFFSET_COMMIT_TIMEOUT_MS_CONFIG = "offset.flush.timeout.ms";
private static final String OFFSET_COMMIT_TIMEOUT_MS_DOC
= "Maximum number of milliseconds to wait for records to flush and partition offset data to be"
+ " committed to offset storage before cancelling the process and restoring the offset "
+ "data to be committed in a future attempt.";
public static final long OFFSET_COMMIT_TIMEOUT_MS_DEFAULT = 5000L;
/**
* @deprecated As of 1.1.0.
*/
@Deprecated
public static final String REST_HOST_NAME_CONFIG = "rest.host.name";
private static final String REST_HOST_NAME_DOC
= "Hostname for the REST API. If this is set, it will only bind to this interface.";
/**
* @deprecated As of 1.1.0.
*/
@Deprecated
public static final String REST_PORT_CONFIG = "rest.port";
private static final String REST_PORT_DOC
= "Port for the REST API to listen on.";
public static final int REST_PORT_DEFAULT = 8083;
public static final String LISTENERS_CONFIG = "listeners";
private static final String LISTENERS_DOC
= "List of comma-separated URIs the REST API will listen on. The supported protocols are HTTP and HTTPS.\n" +
" Specify hostname as 0.0.0.0 to bind to all interfaces.\n" +
" Leave hostname empty to bind to default interface.\n" +
" Examples of legal listener lists: HTTP://myhost:8083,HTTPS://myhost:8084";
public static final String REST_ADVERTISED_HOST_NAME_CONFIG = "rest.advertised.host.name";
private static final String REST_ADVERTISED_HOST_NAME_DOC
= "If this is set, this is the hostname that will be given out to other workers to connect to.";
public static final String REST_ADVERTISED_PORT_CONFIG = "rest.advertised.port";
private static final String REST_ADVERTISED_PORT_DOC
= "If this is set, this is the port that will be given out to other workers to connect to.";
public static final String REST_ADVERTISED_LISTENER_CONFIG = "rest.advertised.listener";
private static final String REST_ADVERTISED_LISTENER_DOC
= "Sets the advertised listener (HTTP or HTTPS) which will be given to other workers to use.";
public static final String ACCESS_CONTROL_ALLOW_ORIGIN_CONFIG = "access.control.allow.origin";
protected static final String ACCESS_CONTROL_ALLOW_ORIGIN_DOC =
"Value to set the Access-Control-Allow-Origin header to for REST API requests." +
"To enable cross origin access, set this to the domain of the application that should be permitted" +
" to access the API, or '*' to allow access from any domain. The default value only allows access" +
" from the domain of the REST API.";
protected static final String ACCESS_CONTROL_ALLOW_ORIGIN_DEFAULT = "";
public static final String ACCESS_CONTROL_ALLOW_METHODS_CONFIG = "access.control.allow.methods";
protected static final String ACCESS_CONTROL_ALLOW_METHODS_DOC =
"Sets the methods supported for cross origin requests by setting the Access-Control-Allow-Methods header. "
+ "The default value of the Access-Control-Allow-Methods header allows cross origin requests for GET, POST and HEAD.";
protected static final String ACCESS_CONTROL_ALLOW_METHODS_DEFAULT = "";
public static final String PLUGIN_PATH_CONFIG = "plugin.path";
protected static final String PLUGIN_PATH_DOC = "List of paths separated by commas (,) that "
+ "contain plugins (connectors, converters, transformations). The list should consist"
+ " of top level directories that include any combination of: \n"
+ "a) directories immediately containing jars with plugins and their dependencies\n"
+ "b) uber-jars with plugins and their dependencies\n"
+ "c) directories immediately containing the package directory structure of classes of "
+ "plugins and their dependencies\n"
+ "Note: symlinks will be followed to discover dependencies or plugins.\n"
+ "Examples: plugin.path=/usr/local/share/java,/usr/local/share/kafka/plugins,"
+ "/opt/connectors";
public static final String CONFIG_PROVIDERS_CONFIG = "config.providers";
protected static final String CONFIG_PROVIDERS_DOC =
"Comma-separated names of ConfigProvider classes, loaded and used "
+ "in the order specified. Implementing the interface "
+ "ConfigProvider allows you to replace variable references in connector configurations, "
+ "such as for externalized secrets. ";
public static final String REST_EXTENSION_CLASSES_CONFIG = "rest.extension.classes";
protected static final String REST_EXTENSION_CLASSES_DOC =
"Comma-separated names of ConnectRestExtension classes, loaded and called "
+ "in the order specified. Implementing the interface "
+ "ConnectRestExtension allows you to inject into Connect's REST API user defined resources like filters. "
+ "Typically used to add custom capability like logging, security, etc. ";
public static final String CONNECTOR_CLIENT_POLICY_CLASS_CONFIG = "connector.client.config.override.policy";
public static final String CONNECTOR_CLIENT_POLICY_CLASS_DOC =
"Class name or alias of implementation of ConnectorClientConfigOverridePolicy. Defines what client configurations can be "
+ "overriden by the connector. The default implementation is `None`. The other possible policies in the framework include `All` "
+ "and `Principal`. ";
public static final String CONNECTOR_CLIENT_POLICY_CLASS_DEFAULT = "None";
public static final String METRICS_SAMPLE_WINDOW_MS_CONFIG = CommonClientConfigs.METRICS_SAMPLE_WINDOW_MS_CONFIG;
public static final String METRICS_NUM_SAMPLES_CONFIG = CommonClientConfigs.METRICS_NUM_SAMPLES_CONFIG;
public static final String METRICS_RECORDING_LEVEL_CONFIG = CommonClientConfigs.METRICS_RECORDING_LEVEL_CONFIG;
public static final String METRIC_REPORTER_CLASSES_CONFIG = CommonClientConfigs.METRIC_REPORTER_CLASSES_CONFIG;
/**
* Get a basic ConfigDef for a WorkerConfig. This includes all the common settings. Subclasses can use this to
* bootstrap their own ConfigDef.
* @return a ConfigDef with all the common options specified
*/
protected static ConfigDef baseConfigDef() {
return new ConfigDef()
.define(BOOTSTRAP_SERVERS_CONFIG, Type.LIST, BOOTSTRAP_SERVERS_DEFAULT,
Importance.HIGH, BOOTSTRAP_SERVERS_DOC)
.define(CLIENT_DNS_LOOKUP_CONFIG,
Type.STRING,
ClientDnsLookup.DEFAULT.toString(),
in(ClientDnsLookup.DEFAULT.toString(),
ClientDnsLookup.USE_ALL_DNS_IPS.toString(),
ClientDnsLookup.RESOLVE_CANONICAL_BOOTSTRAP_SERVERS_ONLY.toString()),
Importance.MEDIUM,
CLIENT_DNS_LOOKUP_DOC)
.define(KEY_CONVERTER_CLASS_CONFIG, Type.CLASS,
Importance.HIGH, KEY_CONVERTER_CLASS_DOC)
.define(VALUE_CONVERTER_CLASS_CONFIG, Type.CLASS,
Importance.HIGH, VALUE_CONVERTER_CLASS_DOC)
.define(INTERNAL_KEY_CONVERTER_CLASS_CONFIG, Type.CLASS, INTERNAL_CONVERTER_DEFAULT,
Importance.LOW, INTERNAL_KEY_CONVERTER_CLASS_DOC)
.define(INTERNAL_VALUE_CONVERTER_CLASS_CONFIG, Type.CLASS, INTERNAL_CONVERTER_DEFAULT,
Importance.LOW, INTERNAL_VALUE_CONVERTER_CLASS_DOC)
.define(TASK_SHUTDOWN_GRACEFUL_TIMEOUT_MS_CONFIG, Type.LONG,
TASK_SHUTDOWN_GRACEFUL_TIMEOUT_MS_DEFAULT, Importance.LOW,
TASK_SHUTDOWN_GRACEFUL_TIMEOUT_MS_DOC)
.define(OFFSET_COMMIT_INTERVAL_MS_CONFIG, Type.LONG, OFFSET_COMMIT_INTERVAL_MS_DEFAULT,
Importance.LOW, OFFSET_COMMIT_INTERVAL_MS_DOC)
.define(OFFSET_COMMIT_TIMEOUT_MS_CONFIG, Type.LONG, OFFSET_COMMIT_TIMEOUT_MS_DEFAULT,
Importance.LOW, OFFSET_COMMIT_TIMEOUT_MS_DOC)
.define(REST_HOST_NAME_CONFIG, Type.STRING, null, Importance.LOW, REST_HOST_NAME_DOC)
.define(REST_PORT_CONFIG, Type.INT, REST_PORT_DEFAULT, Importance.LOW, REST_PORT_DOC)
.define(LISTENERS_CONFIG, Type.LIST, null, Importance.LOW, LISTENERS_DOC)
.define(REST_ADVERTISED_HOST_NAME_CONFIG, Type.STRING, null, Importance.LOW, REST_ADVERTISED_HOST_NAME_DOC)
.define(REST_ADVERTISED_PORT_CONFIG, Type.INT, null, Importance.LOW, REST_ADVERTISED_PORT_DOC)
.define(REST_ADVERTISED_LISTENER_CONFIG, Type.STRING, null, Importance.LOW, REST_ADVERTISED_LISTENER_DOC)
.define(ACCESS_CONTROL_ALLOW_ORIGIN_CONFIG, Type.STRING,
ACCESS_CONTROL_ALLOW_ORIGIN_DEFAULT, Importance.LOW,
ACCESS_CONTROL_ALLOW_ORIGIN_DOC)
.define(ACCESS_CONTROL_ALLOW_METHODS_CONFIG, Type.STRING,
ACCESS_CONTROL_ALLOW_METHODS_DEFAULT, Importance.LOW,
ACCESS_CONTROL_ALLOW_METHODS_DOC)
.define(PLUGIN_PATH_CONFIG,
Type.LIST,
null,
Importance.LOW,
PLUGIN_PATH_DOC)
.define(METRICS_SAMPLE_WINDOW_MS_CONFIG, Type.LONG,
30000, atLeast(0), Importance.LOW,
CommonClientConfigs.METRICS_SAMPLE_WINDOW_MS_DOC)
.define(METRICS_NUM_SAMPLES_CONFIG, Type.INT,
2, atLeast(1), Importance.LOW,
CommonClientConfigs.METRICS_NUM_SAMPLES_DOC)
.define(METRICS_RECORDING_LEVEL_CONFIG, Type.STRING,
Sensor.RecordingLevel.INFO.toString(),
in(Sensor.RecordingLevel.INFO.toString(), Sensor.RecordingLevel.DEBUG.toString()),
Importance.LOW,
CommonClientConfigs.METRICS_RECORDING_LEVEL_DOC)
.define(METRIC_REPORTER_CLASSES_CONFIG, Type.LIST,
"", Importance.LOW,
CommonClientConfigs.METRIC_REPORTER_CLASSES_DOC)
.define(BrokerSecurityConfigs.SSL_CLIENT_AUTH_CONFIG,
ConfigDef.Type.STRING, "none", ConfigDef.Importance.LOW, BrokerSecurityConfigs.SSL_CLIENT_AUTH_DOC)
.define(HEADER_CONVERTER_CLASS_CONFIG, Type.CLASS,
HEADER_CONVERTER_CLASS_DEFAULT,
Importance.LOW, HEADER_CONVERTER_CLASS_DOC)
.define(CONFIG_PROVIDERS_CONFIG, Type.LIST,
Collections.emptyList(),
Importance.LOW, CONFIG_PROVIDERS_DOC)
.define(REST_EXTENSION_CLASSES_CONFIG, Type.LIST, "",
Importance.LOW, REST_EXTENSION_CLASSES_DOC)
.define(CONNECTOR_CLIENT_POLICY_CLASS_CONFIG, Type.STRING, CONNECTOR_CLIENT_POLICY_CLASS_DEFAULT,
Importance.MEDIUM, CONNECTOR_CLIENT_POLICY_CLASS_DOC);
}
private void logInternalConverterDeprecationWarnings(Map props) {
String[] deprecatedConfigs = new String[] {
INTERNAL_KEY_CONVERTER_CLASS_CONFIG,
INTERNAL_VALUE_CONVERTER_CLASS_CONFIG
};
for (String config : deprecatedConfigs) {
if (props.containsKey(config)) {
Class internalConverterClass = getClass(config);
logDeprecatedProperty(config, internalConverterClass.getCanonicalName(), INTERNAL_CONVERTER_DEFAULT.getCanonicalName(), null);
if (internalConverterClass.equals(INTERNAL_CONVERTER_DEFAULT)) {
// log the properties for this converter ...
for (Map.Entry propEntry : originalsWithPrefix(config + ".").entrySet()) {
String prop = propEntry.getKey();
String propValue = propEntry.getValue().toString();
String defaultValue = JsonConverterConfig.SCHEMAS_ENABLE_CONFIG.equals(prop) ? "false" : null;
logDeprecatedProperty(config + "." + prop, propValue, defaultValue, config);
}
}
}
}
}
private void logDeprecatedProperty(String propName, String propValue, String defaultValue, String prefix) {
String prefixNotice = prefix != null
? " (along with all configuration for '" + prefix + "')"
: "";
if (defaultValue != null && defaultValue.equalsIgnoreCase(propValue)) {
log.info(
"Worker configuration property '{}'{} is deprecated and may be removed in an upcoming release. "
+ "The specified value '{}' matches the default, so this property can be safely removed from the worker configuration.",
propName,
prefixNotice,
propValue
);
} else if (defaultValue != null) {
log.warn(
"Worker configuration property '{}'{} is deprecated and may be removed in an upcoming release. "
+ "The specified value '{}' does NOT match the default and recommended value '{}'.",
propName,
prefixNotice,
propValue,
defaultValue
);
} else {
log.warn(
"Worker configuration property '{}'{} is deprecated and may be removed in an upcoming release.",
propName,
prefixNotice
);
}
}
public Integer getRebalanceTimeout() {
return null;
}
@Override
protected Map postProcessParsedConfig(final Map parsedValues) {
return CommonClientConfigs.postProcessReconnectBackoffConfigs(this, parsedValues);
}
public static List pluginLocations(Map props) {
String locationList = props.get(WorkerConfig.PLUGIN_PATH_CONFIG);
return locationList == null
? new ArrayList()
: Arrays.asList(COMMA_WITH_WHITESPACE.split(locationList.trim(), -1));
}
public WorkerConfig(ConfigDef definition, Map props) {
super(definition, props);
logInternalConverterDeprecationWarnings(props);
}
}
