com.chicm.cmraft.common.CmRaftConfiguration.java Source code

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Here is the source code for com.chicm.cmraft.common.CmRaftConfiguration.java

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/**
* Copyright 2014 The CmRaft Project
*
* 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 com.chicm.cmraft.common;

import java.util.Iterator;

import org.apache.commons.configuration.ConfigurationException;
import org.apache.commons.configuration.PropertiesConfiguration;
import org.apache.commons.logging.Log;
import org.apache.commons.logging.LogFactory;

public class CmRaftConfiguration implements Configuration {
    static final Log LOG = LogFactory.getLog(CmRaftConfiguration.class);
    private PropertiesConfiguration conf;

    public CmRaftConfiguration() throws ConfigurationException {
        conf = new PropertiesConfiguration("cmraft.properties");

    }

    public static Configuration create() {
        try {
            CmRaftConfiguration raftConfig = new CmRaftConfiguration();
            return raftConfig;
        } catch (ConfigurationException e) {
            return null;
        }
    }

    @Override
    public void useResource(String resourceName) {
        try {
            conf = new PropertiesConfiguration(resourceName);
        } catch (ConfigurationException e) {
            LOG.error("load resource exception", e);
        }
    }

    @Override
    public Object clone() {
        Configuration obj = CmRaftConfiguration.create();
        obj.clear();
        for (String key : this.getKeys()) {
            obj.set(key, this.getString(key));
        }
        return (Object) obj;
    }

    @Override
    public String toString() {
        StringBuilder sb = new StringBuilder();
        for (String key : this.getKeys()) {
            sb.append(key + ":" + conf.getString(key) + "\n");
        }
        return sb.toString();
    }

    @Override
    public String getString(String key) {
        return conf.getString(key);
    }

    @Override
    public String getString(String key, String defaultValue) {
        return conf.getString(key, defaultValue);
    }

    @Override
    public int getInt(String key) {
        return conf.getInt(key);
    }

    @Override
    public int getInt(String key, int defaultValue) {
        return conf.getInt(key, defaultValue);
    }

    @Override
    public Iterable<String> getKeys() {
        return this.new ConfigurationIterableImpl();
    }

    @Override
    public Iterable<String> getKeys(String prefix) {
        return this.new ConfigurationIterableImplForPrefix(prefix);
    }

    @Override
    public void set(String key, String value) {
        conf.setProperty(key, value);
    }

    @Override
    public void clear() {
        conf.clear();
    }

    @Override
    public void remove(String key) {
        conf.clearProperty(key);
    }

    private class ConfigurationIterableImpl implements Iterable<String> {
        public Iterator<String> iterator() {
            return conf.getKeys();
        }
    }

    private class ConfigurationIterableImplForPrefix implements Iterable<String> {
        private String prefix;

        ConfigurationIterableImplForPrefix(String prefix) {
            this.prefix = prefix;
        }

        public Iterator<String> iterator() {
            return conf.getKeys(prefix);
        }
    }
}