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Adobe Target Java SDK
There is a newer version: 2.6.1
/*
 * Copyright 2021 Adobe. All rights reserved.
 * This file is licensed to you under the Apache License, Version 2.0 (the "License");
 * you may not use this file except in compliance with the License. You may obtain a copy
 * of the License at http://www.apache.org/licenses/LICENSE-2.0
 *
 * Unless required by applicable law or agreed to in writing, software distributed under
 * the License is distributed on an "AS IS" BASIS, WITHOUT WARRANTIES OR REPRESENTATIONS
 * OF ANY KIND, either express or implied. See the License for the specific language
 * governing permissions and limitations under the License.
 */
package com.adobe.target.edge.client.ondevice;

import static org.apache.http.HttpStatus.SC_OK;

import com.adobe.target.delivery.v1.model.ChannelType;
import com.adobe.target.delivery.v1.model.Context;
import com.adobe.target.edge.client.ClientConfig;
import com.adobe.target.edge.client.model.TargetDeliveryRequest;
import com.adobe.target.edge.client.model.TargetDeliveryResponse;
import com.adobe.target.edge.client.service.TargetService;
import com.adobe.target.edge.client.utils.CookieUtils;
import java.util.Timer;
import java.util.TimerTask;
import java.util.concurrent.CompletableFuture;

public class ClusterLocator {

  private static final int MAX_RETRIES = 10;

  private boolean running;
  private int retries;
  private String locationHint;
  private CompletableFuture future = null;
  private Timer timer = null;

  public void start(final ClientConfig clientConfig, final TargetService targetService) {
    if (!clientConfig.isOnDeviceDecisioningEnabled()) {
      return;
    }
    if (this.running) {
      return;
    }
    this.running = true;
    this.retries = 0;
    this.timer = new Timer(this.getClass().getCanonicalName());
    executeRequest(targetService);
  }

  public void stop() {
    if (!this.running) {
      return;
    }
    this.running = false;
    this.timer.cancel();
    if (this.future != null) {
      this.future.cancel(true);
    }
  }

  public String getLocationHint() {
    return this.locationHint;
  }

  private void executeRequest(final TargetService targetService) {
    TargetDeliveryRequest request =
        TargetDeliveryRequest.builder().context(new Context().channel(ChannelType.WEB)).build();
    future = targetService.executeRequestAsync(request);
    future.thenAcceptAsync(
        response -> {
          if (!this.running) {
            return;
          }
          if (response != null
              && response.getStatus() == SC_OK
              && response.getResponse() != null
              && response.getResponse().getId() != null
              && response.getResponse().getId().getTntId() != null) {
            String tntId = response.getResponse().getId().getTntId();
            this.locationHint = CookieUtils.locationHintFromTntId(tntId);
          } else if (retries++ < MAX_RETRIES) {
            this.timer.schedule(
                new TimerTask() {
                  @Override
                  public void run() {
                    executeRequest(targetService);
                  }
                },
                retries * 10000);
          }
        });
  }
}