io.ebeaninternal.server.transaction.PostCommitProcessing Maven / Gradle / Ivy

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ebean core module
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package io.ebeaninternal.server.transaction;

import io.ebeaninternal.api.CoreLog;
import io.ebeaninternal.api.SpiTransaction;
import io.ebeaninternal.api.TransactionEvent;
import io.ebeaninternal.api.TransactionEventTable;
import io.ebeaninternal.api.TransactionEventTable.TableIUD;
import io.ebeaninternal.server.cache.CacheChangeSet;
import io.ebeaninternal.server.cluster.ClusterManager;
import io.ebeaninternal.server.core.PersistRequestBean;

import java.util.List;
import java.util.Set;

import static java.lang.System.Logger.Level.DEBUG;

/**
 * Performs post commit processing using a background thread.
 * 
 * This includes Cluster notification, and BeanPersistListeners.
 * 
 */
final class PostCommitProcessing {

  private static final System.Logger log = CoreLog.internal;

  private final ClusterManager clusterManager;
  private final TransactionEvent event;
  private final String serverName;
  private final TransactionManager manager;
  private final List> listenerNotify;
  private final RemoteTransactionEvent remoteTransactionEvent;
  private final DeleteByIdMap deleteByIdMap;

  /**
   * Create for an external modification.
   */
  PostCommitProcessing(ClusterManager clusterManager, TransactionManager manager, TransactionEvent event) {
    this.clusterManager = clusterManager;
    this.manager = manager;
    this.serverName = manager.name();
    this.event = event;
    this.deleteByIdMap = event.deleteByIdMap();
    this.listenerNotify = event.listenerNotify();
    this.remoteTransactionEvent = createRemoteTransactionEvent();
  }

  /**
   * Create for a transaction.
   */
  PostCommitProcessing(ClusterManager clusterManager, TransactionManager manager, SpiTransaction transaction) {
    this.clusterManager = clusterManager;
    this.manager = manager;
    this.serverName = manager.name();
    this.event = transaction.event();
    this.deleteByIdMap = event.deleteByIdMap();
    this.listenerNotify = event.listenerNotify();
    this.remoteTransactionEvent = createRemoteTransactionEvent();
  }

  /**
   * Perform foreground cache notification if desired.
   */
  void notifyLocalCache() {
    if (manager.notifyL2CacheInForeground) {
      // process l2 cache changes in foreground
      processCacheChanges();
    }
  }

  private void notifyCluster() {
    if (remoteTransactionEvent != null && !remoteTransactionEvent.isEmpty()) {
      // send the interesting events to the cluster
      if (log.isLoggable(DEBUG)) {
        log.log(DEBUG, "Cluster Send: {0}", remoteTransactionEvent);
      }
      clusterManager.broadcast(remoteTransactionEvent);
    }
  }

  /**
   * In background notify persist listeners, cluster and document store.
   */
  Runnable backgroundNotify() {
    return () -> {
      if (!manager.notifyL2CacheInForeground) {
        processCacheChanges();
      }
      localPersistListenersNotify();
      notifyCluster();
    };
  }

  /**
   * Apply the changes to the L2 caches.
   */
  private void processCacheChanges() {
    CacheChangeSet cacheChanges = event.buildCacheChanges(manager);
    if (cacheChanges != null) {
      Set touched = cacheChanges.touchedTables();
      if (touched != null && !touched.isEmpty()) {
        manager.processTouchedTables(touched);
        if (remoteTransactionEvent != null) {
          remoteTransactionEvent.addRemoteTableMod(new RemoteTableMod(touched));
        }
      }
      cacheChanges.apply();
    }
  }

  private void localPersistListenersNotify() {
    if (listenerNotify != null) {
      for (PersistRequestBean request : listenerNotify) {
        request.notifyLocalPersistListener();
      }
    }
    TransactionEventTable eventTables = event.eventTables();
    if (eventTables != null && !eventTables.isEmpty()) {
      BulkEventListenerMap map = manager.bulkEventListenerMap();
      for (TableIUD tableIUD : eventTables.values()) {
        map.process(tableIUD);
      }
    }
  }

  private BeanPersistIdMap createBeanPersistIdMap() {
    if (listenerNotify == null) {
      return null;
    }
    BeanPersistIdMap m = new BeanPersistIdMap();
    for (PersistRequestBean request : listenerNotify) {
      request.addToPersistMap(m);
    }
    return m;
  }

  private RemoteTransactionEvent createRemoteTransactionEvent() {
    if (!clusterManager.isClustering()) {
      return null;
    }
    RemoteTransactionEvent remoteTransactionEvent = new RemoteTransactionEvent(serverName);
    BeanPersistIdMap beanPersistIdMap = createBeanPersistIdMap();
    if (beanPersistIdMap != null) {
      for (BeanPersistIds beanPersist : beanPersistIdMap.values()) {
        remoteTransactionEvent.addBeanPersistIds(beanPersist);
      }
    }
    if (deleteByIdMap != null) {
      remoteTransactionEvent.setDeleteByIdMap(deleteByIdMap);
    }
    TransactionEventTable eventTables = event.eventTables();
    if (eventTables != null && !eventTables.isEmpty()) {
      for (TableIUD tableIUD : eventTables.values()) {
        remoteTransactionEvent.addTableIUD(tableIUD);
      }
    }
    return remoteTransactionEvent;
  }

}