com.yunpian.sdk.YunpianConf Maven / Gradle / Ivy

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/**
 * 
 */
package com.yunpian.sdk;

import java.io.File;
import java.io.FileInputStream;
import java.io.IOException;
import java.io.InputStream;
import java.util.Properties;

import org.slf4j.Logger;
import org.slf4j.LoggerFactory;

import com.yunpian.sdk.constant.YunpianConstant;

/**
 * 云片配置
 * 
 * @ThreadSafe
 * @author dzh
 * @date Nov 22, 2016 7:46:10 PM
 * @since 1.2.0
 */
public class YunpianConf implements YunpianConstant {

    static final Logger LOG = LoggerFactory.getLogger(YunpianConf.class);

    /**
     * 
     */
    private Properties _conf = new Properties();

    private File file;

    private String apikey;

    private InputStream in;

    private Properties props;

    public YunpianConf with(String apikey) {
        this.apikey = apikey;
        return this;
    }

    /**
     * 
     * @param file
     *            absolute path of yunpian.properties
     * @return
     */
    public YunpianConf with(File file) {
        this.file = file;
        return this;
    }

    /**
     * 
     * @param in
     *            InputStream of yunpian.properties
     * @return
     */
    public YunpianConf with(InputStream in) {
        this.in = in;
        return this;
    }

    /**
     * 
     * @param props
     *            properties of yunpian.properties
     * @return
     */
    public YunpianConf with(Properties props) {
        this.props = props;
        return this;
    }

    /**
     * 覆盖次序 props > in > file
     * 
     * @return
     */
    public YunpianConf build() {
        try {
            load(file);
            load(in);
            load(props);

            if (_conf.isEmpty()) {
                LOG.info("load default yunpian.properties");
                load(YunpianClient.class.getResourceAsStream("/yunpian.properties"));
            }
        } catch (Exception e) {
            LOG.warn(e.getMessage(), e.fillInStackTrace());
        } finally {
            file = null;
            in = null;
            props = null;
        }
        LOG.info("apikey-{} conf-{}", getApikey(), _conf.toString());
        return this;
    }

    /**
     * 
     * @param file
     *            yunpian.properties
     * @return
     * @throws IOException
     */
    final YunpianConf load(File file) throws Exception {
        if (file != null && file.exists()) {
            load(new FileInputStream(file));
        }
        return this;
    }

    /**
     * 
     * @param in
     *            InputStream of yunpian.properties
     * @return
     * @throws IOException
     */
    final YunpianConf load(InputStream in) throws Exception {
        if (in != null) {
            _conf.load(in);
        }
        return this;
    }

    final YunpianConf load(Properties props) {
        if (props != null) {
            _conf.clear();
            _conf.putAll(props);
        }
        return this;
    }

    /**
     * 查找顺序: 系统配置->云片配置->默认值
     * 
     * @param key
     * @param defVal
     * @return
     */
    public String getConf(String key, String defVal) {
        return System.getProperty(key, _conf.getProperty(key, defVal));
    }

    public int getConfInt(String key, String defVal) {
        String v = getConf(key, defVal);
        return Integer.parseInt(v);
    }

    // public static class EmptyYunpianConf extends YunpianConf {
    // public String getConf(String key, String defVal) {
    // return "";
    // }
    // }

    /**
     * apikey优先级:
     * 
     * System.getProperty("yp.apikey")
     * yunpian.properties
     * new YunpianClient(apikey)
     * 
     */
    public String getApikey() {
        return System.getProperty(YP_APIKEY, _conf.getProperty(YP_APIKEY, apikey));
    }

    @Override
    public String toString() {
        return "YunpianConf-" + _conf.toString();
    }

}