RP-814 Apply cache to build list

src/main/java/org/ihtsdo/buildcloud/config/Config.java

@@ -162,7 +162,8 @@ public SimpleCacheManager cacheManager() {
 		cacheManager.setCaches(Arrays.asList(
 				getCache("release-center-records"),
 				getCache("global-roles"),
-				getCache("code-system-roles")));
+				getCache("code-system-roles"),
+				getCache("build-records")));
 		return cacheManager;
 	}
 

src/main/java/org/ihtsdo/buildcloud/core/dao/BuildDAOCache.java

@@ -0,0 +1,46 @@
+package org.ihtsdo.buildcloud.core.dao;
+
+import org.ihtsdo.otf.dao.s3.S3Client;
+import org.slf4j.Logger;
+import org.slf4j.LoggerFactory;
+import org.springframework.cache.annotation.Cacheable;
+import org.springframework.stereotype.Service;
+import software.amazon.awssdk.services.s3.model.ListObjectsRequest;
+import software.amazon.awssdk.services.s3.model.ListObjectsResponse;
+import software.amazon.awssdk.services.s3.model.S3Object;
+
+import java.util.ArrayList;
+import java.util.List;
+
+@Service
+public class BuildDAOCache {
+
+    private static final Logger LOGGER = LoggerFactory.getLogger(BuildDAOCache.class);
+
+    @Cacheable(value = "build-records", key="#releaseCenterKey.concat('-').concat(#productKey)")
+    public List<S3Object> getAllS3ObjectKeysWithCache(final S3Client s3Client, String buildBucketName, String prefix, String releaseCenterKey, String productKey) {
+        return getS3Objects(s3Client, buildBucketName, prefix);
+    }
+
+    public List<S3Object> getAllS3ObjectKeysNoCache(final S3Client s3Client, String buildBucketName, String prefix) {
+        return getS3Objects(s3Client, buildBucketName, prefix);
+    }
+
+    private static List<S3Object> getS3Objects(S3Client s3Client, String buildBucketName, String prefix) {
+        LOGGER.debug("Reading S3Objects in {}, {} in batches.", buildBucketName, prefix);
+        ListObjectsRequest listObjectsRequest = ListObjectsRequest.builder().bucket(buildBucketName).prefix(prefix).maxKeys(10000).build();
+        List<S3Object> s3Objects = new ArrayList<>();
+        boolean done = false;
+        while (!done) {
+            ListObjectsResponse listObjectsResponse = s3Client.listObjects(listObjectsRequest);
+            s3Objects.addAll(listObjectsResponse.contents());
+            if (Boolean.TRUE.equals(listObjectsResponse.isTruncated())) {
+                String nextMarker = s3Objects.get(s3Objects.size() - 1).key();
+                listObjectsRequest = ListObjectsRequest.builder().bucket(buildBucketName).prefix(prefix).maxKeys(10000).marker(nextMarker).build();
+            } else {
+                done = true;
+            }
+        }
+        return s3Objects;
+    }
+}