org.apache.kafka.connect.runtime.ConnectorConfig Maven / Gradle / Ivy
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* 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
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package org.apache.kafka.connect.runtime;
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.ConfigDef.Width;
import org.apache.kafka.common.config.ConfigException;
import org.apache.kafka.connect.connector.ConnectRecord;
import org.apache.kafka.connect.errors.ConnectException;
import org.apache.kafka.connect.runtime.errors.ToleranceType;
import org.apache.kafka.connect.runtime.isolation.PluginDesc;
import org.apache.kafka.connect.runtime.isolation.Plugins;
import org.apache.kafka.connect.transforms.Transformation;
import java.util.ArrayList;
import java.util.Collections;
import java.util.HashMap;
import java.util.HashSet;
import java.util.LinkedHashSet;
import java.util.List;
import java.util.Map;
import static org.apache.kafka.common.config.ConfigDef.NonEmptyStringWithoutControlChars.nonEmptyStringWithoutControlChars;
import static org.apache.kafka.common.config.ConfigDef.Range.atLeast;
import static org.apache.kafka.common.config.ConfigDef.ValidString.in;
/**
*
* Configuration options for Connectors. These only include Kafka Connect system-level configuration
* options (e.g. Connector class name, timeouts used by Connect to control the connector) but does
* not include Connector-specific options (e.g. database connection settings).
*
*
* Note that some of these options are not required for all connectors. For example TOPICS_CONFIG
* is sink-specific.
*
*/
public class ConnectorConfig extends AbstractConfig {
protected static final String COMMON_GROUP = "Common";
protected static final String TRANSFORMS_GROUP = "Transforms";
protected static final String ERROR_GROUP = "Error Handling";
public static final String NAME_CONFIG = "name";
private static final String NAME_DOC = "Globally unique name to use for this connector.";
private static final String NAME_DISPLAY = "Connector name";
public static final String CONNECTOR_CLASS_CONFIG = "connector.class";
private static final String CONNECTOR_CLASS_DOC =
"Name or alias of the class for this connector. Must be a subclass of org.apache.kafka.connect.connector.Connector. " +
"If the connector is org.apache.kafka.connect.file.FileStreamSinkConnector, you can either specify this full name, " +
" or use \"FileStreamSink\" or \"FileStreamSinkConnector\" to make the configuration a bit shorter";
private static final String CONNECTOR_CLASS_DISPLAY = "Connector class";
public static final String KEY_CONVERTER_CLASS_CONFIG = WorkerConfig.KEY_CONVERTER_CLASS_CONFIG;
public static final String KEY_CONVERTER_CLASS_DOC = WorkerConfig.KEY_CONVERTER_CLASS_DOC;
public static final String KEY_CONVERTER_CLASS_DISPLAY = "Key converter class";
public static final String VALUE_CONVERTER_CLASS_CONFIG = WorkerConfig.VALUE_CONVERTER_CLASS_CONFIG;
public static final String VALUE_CONVERTER_CLASS_DOC = WorkerConfig.VALUE_CONVERTER_CLASS_DOC;
public static final String VALUE_CONVERTER_CLASS_DISPLAY = "Value converter class";
public static final String HEADER_CONVERTER_CLASS_CONFIG = WorkerConfig.HEADER_CONVERTER_CLASS_CONFIG;
public static final String HEADER_CONVERTER_CLASS_DOC = WorkerConfig.HEADER_CONVERTER_CLASS_DOC;
public static final String HEADER_CONVERTER_CLASS_DISPLAY = "Header converter class";
// The Connector config should not have a default for the header converter, since the absence of a config property means that
// the worker config settings should be used. Thus, we set the default to null here.
public static final String HEADER_CONVERTER_CLASS_DEFAULT = null;
public static final String TASKS_MAX_CONFIG = "tasks.max";
private static final String TASKS_MAX_DOC = "Maximum number of tasks to use for this connector.";
public static final int TASKS_MAX_DEFAULT = 1;
private static final int TASKS_MIN_CONFIG = 1;
private static final String TASK_MAX_DISPLAY = "Tasks max";
public static final String TRANSFORMS_CONFIG = "transforms";
private static final String TRANSFORMS_DOC = "Aliases for the transformations to be applied to records.";
private static final String TRANSFORMS_DISPLAY = "Transforms";
public static final String CONFIG_RELOAD_ACTION_CONFIG = "config.action.reload";
private static final String CONFIG_RELOAD_ACTION_DOC =
"The action that Connect should take on the connector when changes in external " +
"configuration providers result in a change in the connector's configuration properties. " +
"A value of 'none' indicates that Connect will do nothing. " +
"A value of 'restart' indicates that Connect should restart/reload the connector with the " +
"updated configuration properties." +
"The restart may actually be scheduled in the future if the external configuration provider " +
"indicates that a configuration value will expire in the future.";
private static final String CONFIG_RELOAD_ACTION_DISPLAY = "Reload Action";
public static final String CONFIG_RELOAD_ACTION_NONE = Herder.ConfigReloadAction.NONE.toString();
public static final String CONFIG_RELOAD_ACTION_RESTART = Herder.ConfigReloadAction.RESTART.toString();
public static final String ERRORS_RETRY_TIMEOUT_CONFIG = "errors.retry.timeout";
public static final String ERRORS_RETRY_TIMEOUT_DISPLAY = "Retry Timeout for Errors";
public static final int ERRORS_RETRY_TIMEOUT_DEFAULT = 0;
public static final String ERRORS_RETRY_TIMEOUT_DOC = "The maximum duration in milliseconds that a failed operation " +
"will be reattempted. The default is 0, which means no retries will be attempted. Use -1 for infinite retries.";
public static final String ERRORS_RETRY_MAX_DELAY_CONFIG = "errors.retry.delay.max.ms";
public static final String ERRORS_RETRY_MAX_DELAY_DISPLAY = "Maximum Delay Between Retries for Errors";
public static final int ERRORS_RETRY_MAX_DELAY_DEFAULT = 60000;
public static final String ERRORS_RETRY_MAX_DELAY_DOC = "The maximum duration in milliseconds between consecutive retry attempts. " +
"Jitter will be added to the delay once this limit is reached to prevent thundering herd issues.";
public static final String ERRORS_TOLERANCE_CONFIG = "errors.tolerance";
public static final String ERRORS_TOLERANCE_DISPLAY = "Error Tolerance";
public static final ToleranceType ERRORS_TOLERANCE_DEFAULT = ToleranceType.NONE;
public static final String ERRORS_TOLERANCE_DOC = "Behavior for tolerating errors during connector operation. 'none' is the default value " +
"and signals that any error will result in an immediate connector task failure; 'all' changes the behavior to skip over problematic records.";
public static final String ERRORS_LOG_ENABLE_CONFIG = "errors.log.enable";
public static final String ERRORS_LOG_ENABLE_DISPLAY = "Log Errors";
public static final boolean ERRORS_LOG_ENABLE_DEFAULT = false;
public static final String ERRORS_LOG_ENABLE_DOC = "If true, write each error and the details of the failed operation and problematic record " +
"to the Connect application log. This is 'false' by default, so that only errors that are not tolerated are reported.";
public static final String ERRORS_LOG_INCLUDE_MESSAGES_CONFIG = "errors.log.include.messages";
public static final String ERRORS_LOG_INCLUDE_MESSAGES_DISPLAY = "Log Error Details";
public static final boolean ERRORS_LOG_INCLUDE_MESSAGES_DEFAULT = false;
public static final String ERRORS_LOG_INCLUDE_MESSAGES_DOC = "Whether to the include in the log the Connect record that resulted in " +
"a failure. This is 'false' by default, which will prevent record keys, values, and headers from being written to log files, " +
"although some information such as topic and partition number will still be logged.";
private final EnrichedConnectorConfig enrichedConfig;
private static class EnrichedConnectorConfig extends AbstractConfig {
EnrichedConnectorConfig(ConfigDef configDef, Map props) {
super(configDef, props);
}
@Override
public Object get(String key) {
return super.get(key);
}
}
public static ConfigDef configDef() {
int orderInGroup = 0;
int orderInErrorGroup = 0;
return new ConfigDef()
.define(NAME_CONFIG, Type.STRING, ConfigDef.NO_DEFAULT_VALUE, nonEmptyStringWithoutControlChars(), Importance.HIGH, NAME_DOC, COMMON_GROUP, ++orderInGroup, Width.MEDIUM, NAME_DISPLAY)
.define(CONNECTOR_CLASS_CONFIG, Type.STRING, Importance.HIGH, CONNECTOR_CLASS_DOC, COMMON_GROUP, ++orderInGroup, Width.LONG, CONNECTOR_CLASS_DISPLAY)
.define(TASKS_MAX_CONFIG, Type.INT, TASKS_MAX_DEFAULT, atLeast(TASKS_MIN_CONFIG), Importance.HIGH, TASKS_MAX_DOC, COMMON_GROUP, ++orderInGroup, Width.SHORT, TASK_MAX_DISPLAY)
.define(KEY_CONVERTER_CLASS_CONFIG, Type.CLASS, null, Importance.LOW, KEY_CONVERTER_CLASS_DOC, COMMON_GROUP, ++orderInGroup, Width.SHORT, KEY_CONVERTER_CLASS_DISPLAY)
.define(VALUE_CONVERTER_CLASS_CONFIG, Type.CLASS, null, Importance.LOW, VALUE_CONVERTER_CLASS_DOC, COMMON_GROUP, ++orderInGroup, Width.SHORT, VALUE_CONVERTER_CLASS_DISPLAY)
.define(HEADER_CONVERTER_CLASS_CONFIG, Type.CLASS, HEADER_CONVERTER_CLASS_DEFAULT, Importance.LOW, HEADER_CONVERTER_CLASS_DOC, COMMON_GROUP, ++orderInGroup, Width.SHORT, HEADER_CONVERTER_CLASS_DISPLAY)
.define(TRANSFORMS_CONFIG, Type.LIST, Collections.emptyList(), ConfigDef.CompositeValidator.of(new ConfigDef.NonNullValidator(), new ConfigDef.Validator() {
@Override
public void ensureValid(String name, Object value) {
final List transformAliases = (List) value;
if (transformAliases.size() > new HashSet<>(transformAliases).size()) {
throw new ConfigException(name, value, "Duplicate alias provided.");
}
}
}), Importance.LOW, TRANSFORMS_DOC, TRANSFORMS_GROUP, ++orderInGroup, Width.LONG, TRANSFORMS_DISPLAY)
.define(CONFIG_RELOAD_ACTION_CONFIG, Type.STRING, CONFIG_RELOAD_ACTION_RESTART,
in(CONFIG_RELOAD_ACTION_NONE, CONFIG_RELOAD_ACTION_RESTART), Importance.LOW,
CONFIG_RELOAD_ACTION_DOC, COMMON_GROUP, ++orderInGroup, Width.MEDIUM, CONFIG_RELOAD_ACTION_DISPLAY)
.define(ERRORS_RETRY_TIMEOUT_CONFIG, Type.LONG, ERRORS_RETRY_TIMEOUT_DEFAULT, Importance.MEDIUM,
ERRORS_RETRY_TIMEOUT_DOC, ERROR_GROUP, ++orderInErrorGroup, Width.MEDIUM, ERRORS_RETRY_TIMEOUT_DISPLAY)
.define(ERRORS_RETRY_MAX_DELAY_CONFIG, Type.LONG, ERRORS_RETRY_MAX_DELAY_DEFAULT, Importance.MEDIUM,
ERRORS_RETRY_MAX_DELAY_DOC, ERROR_GROUP, ++orderInErrorGroup, Width.MEDIUM, ERRORS_RETRY_MAX_DELAY_DISPLAY)
.define(ERRORS_TOLERANCE_CONFIG, Type.STRING, ERRORS_TOLERANCE_DEFAULT.value(),
in(ToleranceType.NONE.value(), ToleranceType.ALL.value()), Importance.MEDIUM,
ERRORS_TOLERANCE_DOC, ERROR_GROUP, ++orderInErrorGroup, Width.SHORT, ERRORS_TOLERANCE_DISPLAY)
.define(ERRORS_LOG_ENABLE_CONFIG, Type.BOOLEAN, ERRORS_LOG_ENABLE_DEFAULT, Importance.MEDIUM,
ERRORS_LOG_ENABLE_DOC, ERROR_GROUP, ++orderInErrorGroup, Width.SHORT, ERRORS_LOG_ENABLE_DISPLAY)
.define(ERRORS_LOG_INCLUDE_MESSAGES_CONFIG, Type.BOOLEAN, ERRORS_LOG_INCLUDE_MESSAGES_DEFAULT, Importance.MEDIUM,
ERRORS_LOG_INCLUDE_MESSAGES_DOC, ERROR_GROUP, ++orderInErrorGroup, Width.SHORT, ERRORS_LOG_INCLUDE_MESSAGES_DISPLAY);
}
public ConnectorConfig(Plugins plugins) {
this(plugins, new HashMap());
}
public ConnectorConfig(Plugins plugins, Map props) {
this(plugins, configDef(), props);
}
public ConnectorConfig(Plugins plugins, ConfigDef configDef, Map props) {
super(configDef, props);
enrichedConfig = new EnrichedConnectorConfig(
enrich(plugins, configDef, props, true),
props
);
}
@Override
public Object get(String key) {
return enrichedConfig.get(key);
}
public long errorRetryTimeout() {
return getLong(ERRORS_RETRY_TIMEOUT_CONFIG);
}
public long errorMaxDelayInMillis() {
return getLong(ERRORS_RETRY_MAX_DELAY_CONFIG);
}
public ToleranceType errorToleranceType() {
String tolerance = getString(ERRORS_TOLERANCE_CONFIG);
for (ToleranceType type: ToleranceType.values()) {
if (type.name().equalsIgnoreCase(tolerance)) {
return type;
}
}
return ERRORS_TOLERANCE_DEFAULT;
}
public boolean enableErrorLog() {
return getBoolean(ERRORS_LOG_ENABLE_CONFIG);
}
public boolean includeRecordDetailsInErrorLog() {
return getBoolean(ERRORS_LOG_INCLUDE_MESSAGES_CONFIG);
}
/**
* Returns the initialized list of {@link Transformation} which are specified in {@link #TRANSFORMS_CONFIG}.
*/
public > List> transformations() {
final List transformAliases = getList(TRANSFORMS_CONFIG);
final List> transformations = new ArrayList<>(transformAliases.size());
for (String alias : transformAliases) {
final String prefix = TRANSFORMS_CONFIG + "." + alias + ".";
final Transformation transformation;
try {
transformation = getClass(prefix + "type").asSubclass(Transformation.class).newInstance();
} catch (Exception e) {
throw new ConnectException(e);
}
transformation.configure(originalsWithPrefix(prefix));
transformations.add(transformation);
}
return transformations;
}
/**
* Returns an enriched {@link ConfigDef} building upon the {@code ConfigDef}, using the current configuration specified in {@code props} as an input.
*
* {@code requireFullConfig} specifies whether required config values that are missing should cause an exception to be thrown.
*/
public static ConfigDef enrich(Plugins plugins, ConfigDef baseConfigDef, Map props, boolean requireFullConfig) {
Object transformAliases = ConfigDef.parseType(TRANSFORMS_CONFIG, props.get(TRANSFORMS_CONFIG), Type.LIST);
if (!(transformAliases instanceof List)) {
return baseConfigDef;
}
ConfigDef newDef = new ConfigDef(baseConfigDef);
LinkedHashSet uniqueTransformAliases = new LinkedHashSet<>((List) transformAliases);
for (Object o : uniqueTransformAliases) {
if (!(o instanceof String)) {
throw new ConfigException("Item in " + TRANSFORMS_CONFIG + " property is not of "
+ "type String");
}
String alias = (String) o;
final String prefix = TRANSFORMS_CONFIG + "." + alias + ".";
final String group = TRANSFORMS_GROUP + ": " + alias;
int orderInGroup = 0;
final String transformationTypeConfig = prefix + "type";
final ConfigDef.Validator typeValidator = new ConfigDef.Validator() {
@Override
public void ensureValid(String name, Object value) {
getConfigDefFromTransformation(transformationTypeConfig, (Class) value);
}
};
newDef.define(transformationTypeConfig, Type.CLASS, ConfigDef.NO_DEFAULT_VALUE, typeValidator, Importance.HIGH,
"Class for the '" + alias + "' transformation.", group, orderInGroup++, Width.LONG, "Transformation type for " + alias,
Collections.emptyList(), new TransformationClassRecommender(plugins));
final ConfigDef transformationConfigDef;
try {
final String className = props.get(transformationTypeConfig);
final Class cls = (Class) ConfigDef.parseType(transformationTypeConfig, className, Type.CLASS);
transformationConfigDef = getConfigDefFromTransformation(transformationTypeConfig, cls);
} catch (ConfigException e) {
if (requireFullConfig) {
throw e;
} else {
continue;
}
}
newDef.embed(prefix, group, orderInGroup, transformationConfigDef);
}
return newDef;
}
/**
* Return {@link ConfigDef} from {@code transformationCls}, which is expected to be a non-null {@code Class},
* by instantiating it and invoking {@link Transformation#config()}.
*/
static ConfigDef getConfigDefFromTransformation(String key, Class transformationCls) {
if (transformationCls == null || !Transformation.class.isAssignableFrom(transformationCls)) {
throw new ConfigException(key, String.valueOf(transformationCls), "Not a Transformation");
}
Transformation transformation;
try {
transformation = transformationCls.asSubclass(Transformation.class).newInstance();
} catch (Exception e) {
throw new ConfigException(key, String.valueOf(transformationCls), "Error getting config definition from Transformation: " + e.getMessage());
}
ConfigDef configDef = transformation.config();
if (null == configDef) {
throw new ConnectException(
String.format(
"%s.config() must return a ConfigDef that is not null.",
transformationCls.getName()
)
);
}
return configDef;
}
/**
* Recommend bundled transformations.
*/
static final class TransformationClassRecommender implements ConfigDef.Recommender {
private final Plugins plugins;
TransformationClassRecommender(Plugins plugins) {
this.plugins = plugins;
}
@Override
public List