001/*
002 * Licensed to the Apache Software Foundation (ASF) under one
003 * or more contributor license agreements.  See the NOTICE file
004 * distributed with this work for additional information
005 * regarding copyright ownership.  The ASF licenses this file
006 * to you under the Apache License, Version 2.0 (the
007 * "License"); you may not use this file except in compliance
008 * with the License.  You may obtain a copy of the License at
009 *
010 *     http://www.apache.org/licenses/LICENSE-2.0
011 *
012 * Unless required by applicable law or agreed to in writing, software
013 * distributed under the License is distributed on an "AS IS" BASIS,
014 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
015 * See the License for the specific language governing permissions and
016 * limitations under the License.
017 */
018package org.apache.hadoop.hbase.client;
019
020import java.util.Collections;
021import java.util.Map;
022import java.util.Objects;
023import java.util.Optional;
024import java.util.TreeMap;
025import org.apache.hadoop.hbase.Coprocessor;
026import org.apache.yetus.audience.InterfaceAudience;
027
028/**
029 * Used to build the {@link CoprocessorDescriptor}
030 */
031@InterfaceAudience.Public
032public final class CoprocessorDescriptorBuilder {
033
034  public static CoprocessorDescriptor of(String className) {
035    return new CoprocessorDescriptorBuilder(className).build();
036  }
037
038  public static CoprocessorDescriptorBuilder newBuilder(String className) {
039    return new CoprocessorDescriptorBuilder(className);
040  }
041
042  private final String className;
043  private String jarPath;
044  private int priority = Coprocessor.PRIORITY_USER;
045  private Map<String, String> properties = new TreeMap();
046
047  public CoprocessorDescriptorBuilder setJarPath(String jarPath) {
048    this.jarPath = jarPath;
049    return this;
050  }
051
052  public CoprocessorDescriptorBuilder setPriority(int priority) {
053    this.priority = priority;
054    return this;
055  }
056
057  public CoprocessorDescriptorBuilder setProperty(String key, String value) {
058    this.properties.put(key, value);
059    return this;
060  }
061
062  public CoprocessorDescriptorBuilder setProperties(Map<String, String> properties) {
063    this.properties.putAll(properties);
064    return this;
065  }
066
067  public CoprocessorDescriptor build() {
068    return new CoprocessorDescriptorImpl(className, jarPath, priority, properties);
069  }
070
071  private CoprocessorDescriptorBuilder(String className) {
072    this.className = Objects.requireNonNull(className);
073  }
074
075  private static final class CoprocessorDescriptorImpl implements CoprocessorDescriptor {
076    private final String className;
077    private final String jarPath;
078    private final int priority;
079    private final Map<String, String> properties;
080
081    private CoprocessorDescriptorImpl(String className, String jarPath, int priority,
082      Map<String, String> properties) {
083      this.className = className;
084      this.jarPath = jarPath;
085      this.priority = priority;
086      this.properties = properties;
087    }
088
089    @Override
090    public String getClassName() {
091      return className;
092    }
093
094    @Override
095    public Optional<String> getJarPath() {
096      return Optional.ofNullable(jarPath);
097    }
098
099    @Override
100    public int getPriority() {
101      return priority;
102    }
103
104    @Override
105    public Map<String, String> getProperties() {
106      return Collections.unmodifiableMap(properties);
107    }
108
109    @Override
110    public String toString() {
111      return "class:" + className + ", jarPath:" + jarPath + ", priority:" + priority
112        + ", properties:" + properties;
113    }
114  }
115}