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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.acl.AccessControlEntry;
import org.apache.kafka.common.acl.AclBinding;
import org.apache.kafka.common.resource.PatternType;
import org.apache.kafka.common.resource.ResourcePattern;
import org.apache.kafka.common.errors.UnsupportedVersionException;
import org.apache.kafka.common.protocol.ApiKeys;
import org.apache.kafka.common.protocol.Errors;
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.HashMap;
import java.util.List;
import java.util.Map;
import static org.apache.kafka.common.protocol.CommonFields.ERROR_CODE;
import static org.apache.kafka.common.protocol.CommonFields.ERROR_MESSAGE;
import static org.apache.kafka.common.protocol.CommonFields.HOST;
import static org.apache.kafka.common.protocol.CommonFields.OPERATION;
import static org.apache.kafka.common.protocol.CommonFields.PERMISSION_TYPE;
import static org.apache.kafka.common.protocol.CommonFields.PRINCIPAL;
import static org.apache.kafka.common.protocol.CommonFields.RESOURCE_NAME;
import static org.apache.kafka.common.protocol.CommonFields.RESOURCE_PATTERN_TYPE;
import static org.apache.kafka.common.protocol.CommonFields.RESOURCE_TYPE;
import static org.apache.kafka.common.protocol.CommonFields.THROTTLE_TIME_MS;
public class DescribeAclsResponse extends AbstractResponse {
private final static String RESOURCES_KEY_NAME = "resources";
private final static String ACLS_KEY_NAME = "acls";
private static final Schema DESCRIBE_ACLS_RESOURCE_V0 = new Schema(
RESOURCE_TYPE,
RESOURCE_NAME,
new Field(ACLS_KEY_NAME, new ArrayOf(new Schema(
PRINCIPAL,
HOST,
OPERATION,
PERMISSION_TYPE))));
/**
* V1 sees a new `RESOURCE_PATTERN_TYPE` that defines the type of the resource pattern.
*
* For more info, see {@link PatternType}.
*/
private static final Schema DESCRIBE_ACLS_RESOURCE_V1 = new Schema(
RESOURCE_TYPE,
RESOURCE_NAME,
RESOURCE_PATTERN_TYPE,
new Field(ACLS_KEY_NAME, new ArrayOf(new Schema(
PRINCIPAL,
HOST,
OPERATION,
PERMISSION_TYPE))));
private static final Schema DESCRIBE_ACLS_RESPONSE_V0 = new Schema(
THROTTLE_TIME_MS,
ERROR_CODE,
ERROR_MESSAGE,
new Field(RESOURCES_KEY_NAME, new ArrayOf(DESCRIBE_ACLS_RESOURCE_V0), "The resources and their associated ACLs."));
/**
* V1 sees a new `RESOURCE_PATTERN_TYPE` field added to DESCRIBE_ACLS_RESOURCE_V1, that describes how the resource name is interpreted
* and version was bumped to indicate that, on quota violation, brokers send out responses before throttling.
*
* For more info, see {@link PatternType}.
*/
private static final Schema DESCRIBE_ACLS_RESPONSE_V1 = new Schema(
THROTTLE_TIME_MS,
ERROR_CODE,
ERROR_MESSAGE,
new Field(RESOURCES_KEY_NAME, new ArrayOf(DESCRIBE_ACLS_RESOURCE_V1), "The resources and their associated ACLs."));
public static Schema[] schemaVersions() {
return new Schema[]{DESCRIBE_ACLS_RESPONSE_V0, DESCRIBE_ACLS_RESPONSE_V1};
}
private final int throttleTimeMs;
private final ApiError error;
private final Collection acls;
public DescribeAclsResponse(int throttleTimeMs, ApiError error, Collection acls) {
this.throttleTimeMs = throttleTimeMs;
this.error = error;
this.acls = acls;
}
public DescribeAclsResponse(Struct struct) {
this.throttleTimeMs = struct.get(THROTTLE_TIME_MS);
this.error = new ApiError(struct);
this.acls = new ArrayList<>();
for (Object resourceStructObj : struct.getArray(RESOURCES_KEY_NAME)) {
Struct resourceStruct = (Struct) resourceStructObj;
ResourcePattern pattern = RequestUtils.resourcePatternromStructFields(resourceStruct);
for (Object aclDataStructObj : resourceStruct.getArray(ACLS_KEY_NAME)) {
Struct aclDataStruct = (Struct) aclDataStructObj;
AccessControlEntry entry = RequestUtils.aceFromStructFields(aclDataStruct);
this.acls.add(new AclBinding(pattern, entry));
}
}
}
@Override
protected Struct toStruct(short version) {
validate(version);
Struct struct = new Struct(ApiKeys.DESCRIBE_ACLS.responseSchema(version));
struct.set(THROTTLE_TIME_MS, throttleTimeMs);
error.write(struct);
Map> resourceToData = new HashMap<>();
for (AclBinding acl : acls) {
resourceToData
.computeIfAbsent(acl.pattern(), k -> new ArrayList<>())
.add(acl.entry());
}
List resourceStructs = new ArrayList<>();
for (Map.Entry> tuple : resourceToData.entrySet()) {
ResourcePattern resource = tuple.getKey();
Struct resourceStruct = struct.instance(RESOURCES_KEY_NAME);
RequestUtils.resourcePatternSetStructFields(resource, resourceStruct);
List dataStructs = new ArrayList<>();
for (AccessControlEntry entry : tuple.getValue()) {
Struct dataStruct = resourceStruct.instance(ACLS_KEY_NAME);
RequestUtils.aceSetStructFields(entry, dataStruct);
dataStructs.add(dataStruct);
}
resourceStruct.set(ACLS_KEY_NAME, dataStructs.toArray());
resourceStructs.add(resourceStruct);
}
struct.set(RESOURCES_KEY_NAME, resourceStructs.toArray());
return struct;
}
@Override
public int throttleTimeMs() {
return throttleTimeMs;
}
public ApiError error() {
return error;
}
@Override
public Map errorCounts() {
return errorCounts(error.error());
}
public Collection acls() {
return acls;
}
public static DescribeAclsResponse parse(ByteBuffer buffer, short version) {
return new DescribeAclsResponse(ApiKeys.DESCRIBE_ACLS.responseSchema(version).read(buffer));
}
@Override
public boolean shouldClientThrottle(short version) {
return version >= 1;
}
private void validate(short version) {
if (version == 0) {
final boolean unsupported = acls.stream()
.map(AclBinding::pattern)
.map(ResourcePattern::patternType)
.anyMatch(patternType -> patternType != PatternType.LITERAL);
if (unsupported) {
throw new UnsupportedVersionException("Version 0 only supports literal resource pattern types");
}
}
final boolean unknown = acls.stream().anyMatch(AclBinding::isUnknown);
if (unknown) {
throw new IllegalArgumentException("Contain UNKNOWN elements");
}
}
}
