Sendables.java

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/*
 * Turró i Cutiller Foundation. License notice.
 * Copyright (C) 2018 Lluis Turró Cutiller <http://www.turro.org/>
 *
 * This program is free software: you can redistribute it and/or modify
 * it under the terms of the GNU Affero General Public License as published by
 * the Free Software Foundation, either version 3 of the License, or
 * (at your option) any later version.
 *
 * This program is distributed in the hope that it will be useful,
 * but WITHOUT ANY WARRANTY; without even the implied warranty of
 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
 * GNU Affero General Public License for more details.
 *
 * You should have received a copy of the GNU Affero General Public License
 * along with this program.  If not, see <http://www.gnu.org/licenses/>.
 */
 
package org.turro.sendable;
 
import java.util.Collection;
import java.util.Date;
import java.util.concurrent.locks.ReentrantLock;
import org.turro.action.IElephantSendable;
import org.turro.elephant.context.IConstructor;
import org.turro.elephant.db.ElephantPU;
import org.turro.elephant.db.WhereClause;
import org.turro.elephant.entities.db.Sendable;
import org.turro.elephant.entities.db.SendableAssistant;
import org.turro.entities.Entities;
import org.turro.entities.IElephantEntity;
import org.turro.jpa.Dao;
 
public class Sendables {
 
  public static void send(IConstructor constructor) {
    boolean lockAcquired = SENDABLE_LOCK.tryLock();
    if(lockAcquired) {
      try {
        for(Sendable sendable : getSendables()) {
          IElephantEntity iee = Entities.getController(sendable.getEntityPath());
          IElephantSendable is = iee.getSendable();
          if(is != null) {
            is.send(constructor);
          }
        }
      } finally {
        SENDABLE_LOCK.unlock();
      }
    }
  }
  
  public static Collection<Sendable> getSendables() {
    Dao dao = new ElephantPU();
    WhereClause wc = new WhereClause();
    wc.addClause("select s from Sendable s");
    wc.addClause("where s.sent = FALSE");
    wc.addClause("and s.schedule < :now");
    wc.addNamedValue("now", new Date());
    return dao.getResultList(wc);
  }
 
  public static Sendable getSendable(String entityPath) {
    Dao dao = new ElephantPU();
    WhereClause wc = new WhereClause();
    wc.addClause("select s from Sendable s");
    wc.addClause("where s.entityPath = :path");
    wc.addNamedValue("path", entityPath);
    return (Sendable) dao.getSingleResultOrNull(wc);
  }
  
  public static Collection<SendableAssistant> getAssistants(String entityPath, boolean all) {
    Dao dao = new ElephantPU();
    WhereClause wc = new WhereClause();
    wc.addClause("select sa from SendableAssistant sa");
    wc.addClause("where sa.entityPath = :path");
    wc.addNamedValue("path", entityPath);
    if(!all) {
      wc.addClause("and sa.delivered = FALSE");
    }
    return dao.getResultList(wc);
  }
  
  public static void cleanOrphans() {
    Dao dao = new ElephantPU();
    WhereClause wc = new WhereClause();
    wc.addClause("delete from SendableAssistant");
    wc.addClause("where not exists (");
    wc.addClause("select s from Sendable s");
    wc.addClause("where s.entityPath = entityPath");
    wc.addClause(")");
    dao.executeUpdate(wc);
  }
 
  public static void delete(String entityPath) {
    Dao dao = new ElephantPU();
    WhereClause wc = new WhereClause();
    wc.addClause("delete from SendableAssistant");
    wc.addClause("where entityPath = :path");
    wc.addNamedValue("path", entityPath);
    dao.executeUpdate(wc);
    wc = new WhereClause();
    wc.addClause("delete from Sendable");
    wc.addClause("where entityPath = :path");
    wc.addNamedValue("path", entityPath);
    dao.executeUpdate(wc);
  }
 
  public static void delivered(String entityPath, String contactId) {
    Dao dao = new ElephantPU();
    WhereClause wc = new WhereClause();
    wc.addClause("update SendableAssistant");
    wc.addClause("set delivered = TRUE");
    wc.addClause("where entityPath = :path");
    wc.addNamedValue("path", entityPath);
    wc.addClause("and contactId = :contact");
    wc.addNamedValue("contact", contactId);
    dao.executeUpdate(wc);
  }
  
  public static void sent(String entityPath) {
    Dao dao = new ElephantPU();
    WhereClause wc = new WhereClause();
    wc.addClause("update Sendable");
    wc.addClause("set sent = TRUE");
    wc.addClause("where entityPath = :path");
    wc.addNamedValue("path", entityPath);
    dao.executeUpdate(wc);
  }
  
  private Sendables() {
  } 
 
  /* Sendables lock */
  
  private static final ReentrantLock SENDABLE_LOCK = new ReentrantLock();
  
}