kafka TopicsSpec 源码
kafka TopicsSpec 代码
文件路径：/trogdor/src/main/java/org/apache/kafka/trogdor/workload/TopicsSpec.java
/*
* 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.trogdor.workload;
import com.fasterxml.jackson.annotation.JsonAnyGetter;
import com.fasterxml.jackson.annotation.JsonAnySetter;
import com.fasterxml.jackson.annotation.JsonCreator;
import org.apache.kafka.trogdor.common.StringExpander;
import org.apache.kafka.trogdor.rest.Message;
import java.util.Collections;
import java.util.HashMap;
import java.util.Map;
/**
* TopicsSpec maps topic names to descriptions of the partitions in them.
*
* In JSON form, this is serialized as a map whose keys are topic names,
* and whose entries are partition descriptions.
* Keys may also refer to multiple partitions. For example, this specification
* refers to 3 topics foo1, foo2, and foo3:
*
* {
* "foo[1-3]" : {
* "numPartitions": 3
* "replicationFactor": 3
* }
* }
*/
public class TopicsSpec extends Message {
public static final TopicsSpec EMPTY = new TopicsSpec().immutableCopy();
private final Map<String, PartitionsSpec> map;
@JsonCreator
public TopicsSpec() {
this.map = new HashMap<>();
}
private TopicsSpec(Map<String, PartitionsSpec> map) {
this.map = map;
}
@JsonAnyGetter
public Map<String, PartitionsSpec> get() {
return map;
}
@JsonAnySetter
public void set(String name, PartitionsSpec value) {
map.put(name, value);
}
public TopicsSpec immutableCopy() {
HashMap<String, PartitionsSpec> mapCopy = new HashMap<>();
mapCopy.putAll(map);
return new TopicsSpec(Collections.unmodifiableMap(mapCopy));
}
/**
* Enumerate the partitions inside this TopicsSpec.
*
* @return A map from topic names to PartitionsSpec objects.
*/
public Map<String, PartitionsSpec> materialize() {
HashMap<String, PartitionsSpec> all = new HashMap<>();
for (Map.Entry<String, PartitionsSpec> entry : map.entrySet()) {
String topicName = entry.getKey();
PartitionsSpec partitions = entry.getValue();
for (String expandedTopicName : StringExpander.expand(topicName))
all.put(expandedTopicName, partitions);
}
return all;
}
}
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