content: /**
   * Copyright (C) 2024 AIDC-AI
   *
   * Licensed 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 CONDITIONS OF ANY KIND, either express or implied.
   * See the License for the specific language governing permissions and
   * limitations under the License.
   */
  package com.alibaba.langengine.vectordbrust.vectorstore;
  
  import lombok.Data;
  import lombok.extern.slf4j.Slf4j;
  
  import java.util.Arrays;
  import java.util.Collections;
  
  @Slf4j
  @Data
  public class VectorDbHealthCheck {
      
      private final VectorDbRustService service;
      
      public VectorDbHealthCheck(VectorDbRustService service) {
          this.service = service;
      }
      
      public HealthStatus checkHealth() {
          HealthStatus status = new HealthStatus();
          
          try {
              // Check initialization
              status.setInitialized(service.isInitialized());
              
              // Check connection pool
              status.setActiveConnections(service.getActiveConnections());
              status.setAvailableConnections(service.getAvailableConnections());
              
              // Perform basic search test
              if (service.isInitialized()) {
                  long startTime = System.currentTimeMillis();
                  service.similaritySearch(Arrays.asList(0.1, 0.2, 0.3), 1);
                  status.setResponseTimeMs(System.currentTimeMillis() - startTime);
                  status.setHealthy(true);
              }
              
          } catch (Exception e) {
              log.warn("Health check failed", e);
              status.setHealthy(false);
              status.setErrorMessage(e.getMessage());
          }
          
          return status;
      }
      
      @Data
      public static class HealthStatus {
          private boolean healthy = false;
          private boolean initialized = false;
          private int activeConnections = 0;
          private int availableConnections = 0;
          private long responseTimeMs = -1;
          private String errorMessage;
          
          public boolean isHealthy() {
              return healthy && initialized && activeConnections > 0;
          }
      }
  }