org.apache.solr.common.cloud.ZkNodeProps.java Source code

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Here is the source code for org.apache.solr.common.cloud.ZkNodeProps.java

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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.solr.common.cloud;

import java.io.IOException;
import java.util.Collections;
import java.util.LinkedHashMap;
import java.util.Map;
import java.util.Set;

import org.apache.solr.common.util.JavaBinCodec;
import org.apache.solr.common.util.Utils;
import org.noggit.JSONWriter;

import static org.apache.solr.common.util.Utils.toJSONString;

/**
 * ZkNodeProps contains generic immutable properties.
 */
public class ZkNodeProps implements JSONWriter.Writable {

    protected final Map<String, Object> propMap;

    /**
     * Construct ZKNodeProps from map.
     */
    public ZkNodeProps(Map<String, Object> propMap) {
        this.propMap = propMap;
        // TODO: store an unmodifiable map, but in a way that guarantees not to wrap more than once.
        // Always wrapping introduces a memory leak.
    }

    public ZkNodeProps plus(String key, Object val) {
        return plus(Collections.singletonMap(key, val));
    }

    public ZkNodeProps plus(Map<String, Object> newVals) {
        LinkedHashMap<String, Object> copy = new LinkedHashMap<>(propMap);
        if (newVals == null || newVals.isEmpty())
            return new ZkNodeProps(copy);
        copy.putAll(newVals);
        return new ZkNodeProps(copy);
    }

    /**
     * Constructor that populates the from array of Strings in form key1, value1,
     * key2, value2, ..., keyN, valueN
     */
    public ZkNodeProps(String... keyVals) {
        this(Utils.makeMap((Object[]) keyVals));
    }

    public static ZkNodeProps fromKeyVals(Object... keyVals) {
        return new ZkNodeProps(Utils.makeMap(keyVals));
    }

    /**
     * Get property keys.
     */
    public Set<String> keySet() {
        return propMap.keySet();
    }

    /**
     * Get all properties as map.
     */
    public Map<String, Object> getProperties() {
        return propMap;
    }

    /** Returns a shallow writable copy of the properties */
    public Map<String, Object> shallowCopy() {
        return new LinkedHashMap<>(propMap);
    }

    /**
     * Create Replica from json string that is typically stored in zookeeper.
     */
    public static ZkNodeProps load(byte[] bytes) {
        Map<String, Object> props = null;
        if (bytes[0] == 2) {
            try {
                props = (Map<String, Object>) new JavaBinCodec().unmarshal(bytes);
            } catch (IOException e) {
                throw new RuntimeException("Unable to parse javabin content");
            }
        } else {
            props = (Map<String, Object>) Utils.fromJSON(bytes);
        }
        return new ZkNodeProps(props);
    }

    @Override
    public void write(JSONWriter jsonWriter) {
        jsonWriter.write(propMap);
    }

    /**
     * Get a string property value.
     */
    public String getStr(String key) {
        Object o = propMap.get(key);
        return o == null ? null : o.toString();
    }

    /**
     * Get a string property value.
     */
    public Integer getInt(String key, Integer def) {
        Object o = propMap.get(key);
        return o == null ? def : Integer.valueOf(o.toString());
    }

    /**
     * Get a string property value.
     */
    public String getStr(String key, String def) {
        Object o = propMap.get(key);
        return o == null ? def : o.toString();
    }

    public Object get(String key) {
        return propMap.get(key);
    }

    @Override
    public String toString() {
        return toJSONString(this);
        /***
        StringBuilder sb = new StringBuilder();
        Set<Entry<String,Object>> entries = propMap.entrySet();
        for(Entry<String,Object> entry : entries) {
          sb.append(entry.getKey() + "=" + entry.getValue() + "\n");
        }
        return sb.toString();
        ***/
    }

    /**
     * Check if property key exists.
     */
    public boolean containsKey(String key) {
        return propMap.containsKey(key);
    }

    public boolean getBool(String key, boolean b) {
        Object o = propMap.get(key);
        if (o == null)
            return b;
        if (o instanceof Boolean)
            return (boolean) o;
        return Boolean.parseBoolean(o.toString());
    }

    @Override
    public boolean equals(Object that) {
        return that instanceof ZkNodeProps && ((ZkNodeProps) that).propMap.equals(this.propMap);
    }
}