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Cluster management for reactive, scalable resiliency of JVM tools and applications running on VLINGO XOOM Actors.

There is a newer version: 1.7.5

// Copyright © 2012-2020 VLINGO LABS. All rights reserved.
//
// This Source Code Form is subject to the terms of the
// Mozilla Public License, v. 2.0. If a copy of the MPL
// was not distributed with this file, You can obtain
// one at https://mozilla.org/MPL/2.0/.

package io.vlingo.cluster.model.attribute;

import io.vlingo.cluster.model.attribute.message.ReceivedAttributeMessage;
import io.vlingo.wire.node.Configuration;

final class RemoteAttributeRequestHandler {
  private final Configuration configuration;
  private final ConfirmingDistributor confirmingDistributor;
  private final AttributeSetRepository repository;
  
  RemoteAttributeRequestHandler(final ConfirmingDistributor confirmingDistributor, final Configuration configuration, final AttributeSetRepository repository) {
    this.confirmingDistributor = confirmingDistributor;
    this.configuration = configuration;
    this.repository = repository;
  }

  void addAttribute(final ReceivedAttributeMessage request) {
    AttributeSet attributeSet = repository.attributeSetOf(request.attributeSetName());
    if (attributeSet.isNone()) {
      attributeSet = AttributeSet.named(request.attributeSetName());
      repository.add(attributeSet);
    }
    final TrackedAttribute tracked = attributeSet.addIfAbsent(request.attribute());
    confirmingDistributor.confirm(request.trackingId(), attributeSet, tracked, request.type(), configuration.nodeMatching(request.sourceNodeId()));
  }

  void createAttributeSet(final ReceivedAttributeMessage request) {
    AttributeSet attributeSet = repository.attributeSetOf(request.attributeSetName());
    if (attributeSet.isNone()) {
      attributeSet = AttributeSet.named(request.attributeSetName());
      repository.add(attributeSet);
    }
    confirmingDistributor.confirmCreate(request.trackingId(), attributeSet, configuration.nodeMatching(request.sourceNodeId()));
  }

  void removeAttributeSet(final ReceivedAttributeMessage request) {
    AttributeSet attributeSet = repository.attributeSetOf(request.attributeSetName());
    if (attributeSet.isDefined()) {
      attributeSet = AttributeSet.named(request.attributeSetName());
      repository.remove(request.attributeSetName());
    }
    confirmingDistributor.confirmRemove(request.trackingId(), attributeSet, configuration.nodeMatching(request.sourceNodeId()));
  }

  void replaceAttribute(final ReceivedAttributeMessage request) {
    final AttributeSet attributeSet = repository.attributeSetOf(request.attributeSetName());
    if (attributeSet.isDefined()) {
      final TrackedAttribute tracked = attributeSet.replace(request.attribute());
      if (tracked.isPresent()) { // was both present and replaced
        confirmingDistributor.confirm(request.trackingId(), attributeSet, tracked, request.type(), configuration.nodeMatching(request.sourceNodeId()));
      }
    }
  }

  void removeAttribute(final ReceivedAttributeMessage request) {
    final AttributeSet attributeSet = repository.attributeSetOf(request.attributeSetName());
    if (attributeSet.isDefined()) {
      final TrackedAttribute tracked = attributeSet.remove(request.attribute());
      if (tracked.isPresent()) { // actually was present, now removed
        confirmingDistributor.confirm(request.trackingId(), attributeSet, tracked, request.type(), configuration.nodeMatching(request.sourceNodeId()));
      }
    }
  }
}