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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.common.requests;
import org.apache.kafka.common.config.ConfigResource;
import org.apache.kafka.common.protocol.ApiKeys;
import org.apache.kafka.common.protocol.types.ArrayOf;
import org.apache.kafka.common.protocol.types.Field;
import org.apache.kafka.common.protocol.types.Schema;
import org.apache.kafka.common.protocol.types.Struct;
import java.nio.ByteBuffer;
import java.util.ArrayList;
import java.util.Collection;
import java.util.Collections;
import java.util.HashMap;
import java.util.List;
import java.util.Map;
import java.util.Objects;
import static org.apache.kafka.common.protocol.types.Type.BOOLEAN;
import static org.apache.kafka.common.protocol.types.Type.INT8;
import static org.apache.kafka.common.protocol.types.Type.STRING;
public class DescribeConfigsRequest extends AbstractRequest {
private static final String RESOURCES_KEY_NAME = "resources";
private static final String INCLUDE_SYNONYMS = "include_synonyms";
private static final String RESOURCE_TYPE_KEY_NAME = "resource_type";
private static final String RESOURCE_NAME_KEY_NAME = "resource_name";
private static final String CONFIG_NAMES_KEY_NAME = "config_names";
private static final Schema DESCRIBE_CONFIGS_REQUEST_RESOURCE_V0 = new Schema(
new Field(RESOURCE_TYPE_KEY_NAME, INT8),
new Field(RESOURCE_NAME_KEY_NAME, STRING),
new Field(CONFIG_NAMES_KEY_NAME, ArrayOf.nullable(STRING)));
private static final Schema DESCRIBE_CONFIGS_REQUEST_V0 = new Schema(
new Field(RESOURCES_KEY_NAME, new ArrayOf(DESCRIBE_CONFIGS_REQUEST_RESOURCE_V0), "An array of config resources to be returned."));
private static final Schema DESCRIBE_CONFIGS_REQUEST_V1 = new Schema(
new Field(RESOURCES_KEY_NAME, new ArrayOf(DESCRIBE_CONFIGS_REQUEST_RESOURCE_V0), "An array of config resources to be returned."),
new Field(INCLUDE_SYNONYMS, BOOLEAN));
/**
* The version number is bumped to indicate that on quota violation brokers send out responses before throttling.
*/
private static final Schema DESCRIBE_CONFIGS_REQUEST_V2 = DESCRIBE_CONFIGS_REQUEST_V1;
public static Schema[] schemaVersions() {
return new Schema[]{DESCRIBE_CONFIGS_REQUEST_V0, DESCRIBE_CONFIGS_REQUEST_V1, DESCRIBE_CONFIGS_REQUEST_V2};
}
@SuppressWarnings("rawtypes")
public static class Builder extends AbstractRequest.Builder {
private final Map> resourceToConfigNames;
private boolean includeSynonyms;
public Builder(Map> resourceToConfigNames) {
super(ApiKeys.DESCRIBE_CONFIGS);
this.resourceToConfigNames = Objects.requireNonNull(resourceToConfigNames, "resourceToConfigNames");
}
public Builder includeSynonyms(boolean includeSynonyms) {
this.includeSynonyms = includeSynonyms;
return this;
}
public Builder(Collection resources) {
this(toResourceToConfigNames(resources));
}
private static Map> toResourceToConfigNames(Collection resources) {
Map> result = new HashMap<>(resources.size());
for (ConfigResource resource : resources)
result.put(resource, null);
return result;
}
@Override
public DescribeConfigsRequest build(short version) {
return new DescribeConfigsRequest(version, resourceToConfigNames, includeSynonyms);
}
}
private final Map> resourceToConfigNames;
private final boolean includeSynonyms;
public DescribeConfigsRequest(short version, Map> resourceToConfigNames, boolean includeSynonyms) {
super(ApiKeys.DESCRIBE_CONFIGS, version);
this.resourceToConfigNames = Objects.requireNonNull(resourceToConfigNames, "resourceToConfigNames");
this.includeSynonyms = includeSynonyms;
}
public DescribeConfigsRequest(Struct struct, short version) {
super(ApiKeys.DESCRIBE_CONFIGS, version);
Object[] resourcesArray = struct.getArray(RESOURCES_KEY_NAME);
resourceToConfigNames = new HashMap<>(resourcesArray.length);
for (Object resourceObj : resourcesArray) {
Struct resourceStruct = (Struct) resourceObj;
ConfigResource.Type resourceType = ConfigResource.Type.forId(resourceStruct.getByte(RESOURCE_TYPE_KEY_NAME));
String resourceName = resourceStruct.getString(RESOURCE_NAME_KEY_NAME);
Object[] configNamesArray = resourceStruct.getArray(CONFIG_NAMES_KEY_NAME);
List configNames = null;
if (configNamesArray != null) {
configNames = new ArrayList<>(configNamesArray.length);
for (Object configNameObj : configNamesArray)
configNames.add((String) configNameObj);
}
resourceToConfigNames.put(new ConfigResource(resourceType, resourceName), configNames);
}
this.includeSynonyms = struct.hasField(INCLUDE_SYNONYMS) ? struct.getBoolean(INCLUDE_SYNONYMS) : false;
}
public Collection resources() {
return resourceToConfigNames.keySet();
}
/**
* Return null if all config names should be returned.
*/
public Collection configNames(ConfigResource resource) {
return resourceToConfigNames.get(resource);
}
public boolean includeSynonyms() {
return includeSynonyms;
}
@Override
protected Struct toStruct() {
Struct struct = new Struct(ApiKeys.DESCRIBE_CONFIGS.requestSchema(version()));
List resourceStructs = new ArrayList<>(resources().size());
for (Map.Entry> entry : resourceToConfigNames.entrySet()) {
ConfigResource resource = entry.getKey();
Struct resourceStruct = struct.instance(RESOURCES_KEY_NAME);
resourceStruct.set(RESOURCE_TYPE_KEY_NAME, resource.type().id());
resourceStruct.set(RESOURCE_NAME_KEY_NAME, resource.name());
String[] configNames = entry.getValue() == null ? null : entry.getValue().toArray(new String[0]);
resourceStruct.set(CONFIG_NAMES_KEY_NAME, configNames);
resourceStructs.add(resourceStruct);
}
struct.set(RESOURCES_KEY_NAME, resourceStructs.toArray(new Struct[0]));
struct.setIfExists(INCLUDE_SYNONYMS, includeSynonyms);
return struct;
}
@Override
public DescribeConfigsResponse getErrorResponse(int throttleTimeMs, Throwable e) {
short version = version();
switch (version) {
case 0:
case 1:
case 2:
ApiError error = ApiError.fromThrowable(e);
Map errors = new HashMap<>(resources().size());
DescribeConfigsResponse.Config config = new DescribeConfigsResponse.Config(error,
Collections.emptyList());
for (ConfigResource resource : resources())
errors.put(resource, config);
return new DescribeConfigsResponse(throttleTimeMs, errors);
default:
throw new IllegalArgumentException(String.format("Version %d is not valid. Valid versions for %s are 0 to %d",
version, this.getClass().getSimpleName(), ApiKeys.DESCRIBE_CONFIGS.latestVersion()));
}
}
public static DescribeConfigsRequest parse(ByteBuffer buffer, short version) {
return new DescribeConfigsRequest(ApiKeys.DESCRIBE_CONFIGS.parseRequest(version, buffer), version);
}
}
