PawSQLite-Cordova-Adapter/src/android/DBManager.java

package org.n0m.pawsqlite;

import java.util.concurrent.ConcurrentHashMap;

import org.apache.cordova.CordovaInterface;

import java.io.File;

public class DBManager {
  private static final String TAG = "PawSQLite";

  private CordovaInterface cordova;
  private ConcurrentHashMap<String, DBRunner> dbRunnerMap =
    new ConcurrentHashMap<String, DBRunner>();


  DBManager(CordovaInterface cordova) {
    this.cordova = cordova;
  }

  public void queueRequest(String dbName, DBRequest request) {
    DBRunner dbRunner = dbRunnerMap.get(dbName);

    if (dbRunner == null) {
      File dbFile = cordova.getActivity().getDatabasePath(dbName);
      dbRunner = new DBRunner(dbFile, dbName);
      this.cordova.getThreadPool().execute(dbRunner);
      dbRunnerMap.put(dbName, dbRunner);
    }

    dbRunner.queueRequest(request);

    // Remove dbRunner if it is being closed
    if (request.action == DBAction.CLOSE ||
      request.action == DBAction.DELETE) {

      this.remove(dbName);
    }
  }

  public void remove(String dbName) {
    dbRunnerMap.remove(dbName);
  }
}