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package com.litongjava.ehcache;

import java.io.InputStream;
import java.net.URL;

import com.litongjava.db.IPlugin;

import net.sf.ehcache.CacheManager;
import net.sf.ehcache.config.Configuration;

/**
 * EhCachePlugin.
 */
public class EhCachePlugin implements IPlugin {

  private static CacheManager cacheManager;
  private String configurationFileName;
  private URL configurationFileURL;
  private InputStream inputStream;
  private Configuration configuration;

  public EhCachePlugin() {

  }

  public EhCachePlugin(CacheManager cacheManager) {
    EhCachePlugin.cacheManager = cacheManager;
  }

  public EhCachePlugin(String configurationFileName) {
    this.configurationFileName = configurationFileName;
  }

  public EhCachePlugin(URL configurationFileURL) {
    this.configurationFileURL = configurationFileURL;
  }

  public EhCachePlugin(InputStream inputStream) {
    this.inputStream = inputStream;
  }

  public EhCachePlugin(Configuration configuration) {
    this.configuration = configuration;
  }

  public boolean start() {
    createCacheManager();
    EhCache.init(cacheManager);
    return true;
  }

  private void createCacheManager() {
    if (cacheManager != null) {
      return;
    }

    if (configurationFileName != null) {
      cacheManager = CacheManager.create(configurationFileName);
      return;
    }

    if (configurationFileURL != null) {
      cacheManager = CacheManager.create(configurationFileURL);
      return;
    }

    if (inputStream != null) {
      cacheManager = CacheManager.create(inputStream);
      return;
    }

    if (configuration != null) {
      cacheManager = CacheManager.create(configuration);
      return;
    }

    cacheManager = CacheManager.create();
  }

  public boolean stop() {
    cacheManager.shutdown();
    cacheManager = null;
    return true;
  }
}