org.apache.distributedlog.service.streamset.Partition Maven / Gradle / Ivy
/**
* 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.distributedlog.service.streamset;
import com.google.common.base.Objects;
/**
* `Partition` defines the relationship between a `virtual` stream and a
* physical DL stream.
*
* A `virtual` stream could be partitioned into multiple partitions
* and each partition is effectively a DL stream.
*/
public class Partition {
// Name of its parent stream.
private final String stream;
// Unique id of the partition within the stream.
// It can be just simply an index id.
public final int id;
public Partition(String stream, int id) {
this.stream = stream;
this.id = id;
}
/**
* Get the `virtual` stream name.
*
* @return the stream name.
*/
public String getStream() {
return stream;
}
/**
* Get the partition id of this partition.
*
* @return partition id
*/
public int getId() {
return id;
}
/**
* Get the 6 digit 0 padded id of this partition as a String.
* @return partition id
*/
public String getPaddedId() {
return String.format("%06d", getId());
}
@Override
public boolean equals(Object o) {
if (this == o) {
return true;
}
if (!(o instanceof Partition)) {
return false;
}
Partition partition = (Partition) o;
return id == partition.id && Objects.equal(stream, partition.stream);
}
@Override
public int hashCode() {
int result = stream.hashCode();
result = 31 * result + id;
return result;
}
@Override
public String toString() {
StringBuilder sb = new StringBuilder();
sb.append("Partition(")
.append(stream)
.append(", ")
.append(id)
.append(")");
return sb.toString();
}
}