feature(openapi): Add a new API to load items with pagination

CHANGES.md

@@ -17,5 +17,6 @@ Apollo 2.1.0
 * [Allow users to associate multiple public namespaces at a time](https://github.com/apolloconfig/apollo/pull/4437)
 * [Move apollo-demo, scripts/docker-quick-start and scripts/apollo-on-kubernetes out of main repository](https://github.com/apolloconfig/apollo/pull/4440)
 * [Add search key when comparing Configuration items](https://github.com/apolloconfig/apollo/pull/4459)
+* [Add a new API to load items with pagination](https://github.com/apolloconfig/apollo/pull/4468)
 ------------------
 All issues and pull requests are [here](https://github.com/apolloconfig/apollo/milestone/11?closed=1)

apollo-adminservice/src/main/java/com/ctrip/framework/apollo/adminservice/controller/ItemController.java

@@ -27,6 +27,7 @@
 import com.ctrip.framework.apollo.biz.service.ReleaseService;
 import com.ctrip.framework.apollo.biz.utils.ConfigChangeContentBuilder;
 import com.ctrip.framework.apollo.common.dto.ItemDTO;
+import com.ctrip.framework.apollo.common.dto.PageDTO;
 import com.ctrip.framework.apollo.common.exception.BadRequestException;
 import com.ctrip.framework.apollo.common.exception.NotFoundException;
 import com.ctrip.framework.apollo.common.utils.BeanUtils;
@@ -37,6 +38,9 @@
 import java.util.List;
 import java.util.Objects;
 import java.util.stream.Collectors;
+
+import org.springframework.data.domain.Page;
+import org.springframework.data.domain.Pageable;
 import org.springframework.web.bind.annotation.DeleteMapping;
 import org.springframework.web.bind.annotation.GetMapping;
 import org.springframework.web.bind.annotation.PathVariable;
@@ -236,4 +240,15 @@ public ItemDTO get(@PathVariable("appId") String appId,
     return BeanUtils.transform(ItemDTO.class, item);
   }
 
+  @GetMapping(value = "/apps/{appId}/clusters/{clusterName}/namespaces/{namespaceName}/items-with-page")
+  public PageDTO<ItemDTO> findItemsByNamespace(@PathVariable("appId") String appId,
+                                               @PathVariable("clusterName") String clusterName,
+                                               @PathVariable("namespaceName") String namespaceName,
+                                               Pageable pageable) {
+    Page<Item> itemPage = itemService.findItemsByNamespace(appId, clusterName, namespaceName, pageable);
+
+    List<ItemDTO> itemDTOS = BeanUtils.batchTransform(ItemDTO.class, itemPage.getContent());
+    return new PageDTO<>(itemDTOS, pageable, itemPage.getTotalElements());
+  }
+
 }

apollo-biz/src/main/java/com/ctrip/framework/apollo/biz/repository/ItemRepository.java

@@ -38,6 +38,8 @@ public interface ItemRepository extends PagingAndSortingRepository<Item, Long> {
   List<Item> findByNamespaceIdAndDataChangeLastModifiedTimeGreaterThan(Long namespaceId, Date date);
 
   Page<Item> findByKey(String key, Pageable pageable);
+
+  Page<Item> findByNamespaceId(Long namespaceId, Pageable pageable);
 
   Item findFirst1ByNamespaceIdOrderByLineNumDesc(Long namespaceId);
 

apollo-biz/src/main/java/com/ctrip/framework/apollo/biz/service/ItemService.java

@@ -80,20 +80,12 @@ public int batchDelete(long namespaceId, String operator) {
   }
 
   public Item findOne(String appId, String clusterName, String namespaceName, String key) {
-    Namespace namespace = namespaceService.findOne(appId, clusterName, namespaceName);
-    if (namespace == null) {
-      throw new NotFoundException(
-          String.format("namespace not found for %s %s %s", appId, clusterName, namespaceName));
-    }
+    Namespace namespace = findNamespaceByAppIdAndClusterNameAndNamespaceName(appId, clusterName, namespaceName);
     return itemRepository.findByNamespaceIdAndKey(namespace.getId(), key);
   }
 
   public Item findLastOne(String appId, String clusterName, String namespaceName) {
-    Namespace namespace = namespaceService.findOne(appId, clusterName, namespaceName);
-    if (namespace == null) {
-      throw new NotFoundException(
-          String.format("namespace not found for %s %s %s", appId, clusterName, namespaceName));
-    }
+    Namespace namespace = findNamespaceByAppIdAndClusterNameAndNamespaceName(appId, clusterName, namespaceName);
     return findLastOne(namespace.getId());
   }
 
@@ -145,6 +137,11 @@ public Page<Item> findItemsByKey(String key, Pageable pageable) {
     return itemRepository.findByKey(key, pageable);
   }
 
+  public Page<Item> findItemsByNamespace(String appId, String clusterName, String namespaceName, Pageable pageable) {
+    Namespace namespace = findNamespaceByAppIdAndClusterNameAndNamespaceName(appId, clusterName, namespaceName);
+    return itemRepository.findByNamespaceId(namespace.getId(), pageable);
+  }
+
   @Transactional
   public Item save(Item entity) {
     checkItemKeyLength(entity.getKey());
@@ -222,4 +219,15 @@ private int getItemValueLengthLimit(long namespaceId) {
     return bizConfig.itemValueLengthLimit();
   }
 
+  private Namespace findNamespaceByAppIdAndClusterNameAndNamespaceName(String appId,
+                                                                       String clusterName,
+                                                                       String namespaceName) {
+    Namespace namespace = namespaceService.findOne(appId, clusterName, namespaceName);
+    if (namespace == null) {
+      throw new NotFoundException(String.format("namespace not found for appId:%s clusterName:%s namespaceName:%s",
+              appId, clusterName, namespaceName));
+    }
+    return namespace;
+  }
+
 }

apollo-common/src/main/java/com/ctrip/framework/apollo/common/dto/PageDTO.java

@@ -37,7 +37,6 @@ public PageDTO(List<T> content, Pageable pageable, long total) {
     this.size = pageable.getPageSize();
   }
 
-
   public long getTotal() {
     return total;
   }
@@ -54,7 +53,7 @@ public int getSize() {
     return size;
   }
 
-  public boolean hasContent(){
+  public boolean hasContent() {
     return content != null && content.size() > 0;
   }
 }

apollo-openapi/src/main/java/com/ctrip/framework/apollo/openapi/api/ItemOpenApiService.java

@@ -17,6 +17,7 @@
 package com.ctrip.framework.apollo.openapi.api;
 
 import com.ctrip.framework.apollo.openapi.dto.OpenItemDTO;
+import com.ctrip.framework.apollo.openapi.dto.OpenPageDTO;
 
 /**
  * @author wxq
@@ -37,4 +38,8 @@ void createOrUpdateItem(String appId, String env, String clusterName, String nam
 
   void removeItem(String appId, String env, String clusterName, String namespaceName, String key,
       String operator);
+
+  OpenPageDTO<OpenItemDTO> findItemsByNamespace(String appId, String env, String clusterName,
+                                                String namespaceName, int page, int size);
+
 }

apollo-openapi/src/main/java/com/ctrip/framework/apollo/openapi/client/ApolloOpenApiClient.java

@@ -22,15 +22,7 @@
 import com.ctrip.framework.apollo.openapi.client.service.ItemOpenApiService;
 import com.ctrip.framework.apollo.openapi.client.service.NamespaceOpenApiService;
 import com.ctrip.framework.apollo.openapi.client.service.ReleaseOpenApiService;
-import com.ctrip.framework.apollo.openapi.dto.NamespaceReleaseDTO;
-import com.ctrip.framework.apollo.openapi.dto.OpenAppDTO;
-import com.ctrip.framework.apollo.openapi.dto.OpenAppNamespaceDTO;
-import com.ctrip.framework.apollo.openapi.dto.OpenClusterDTO;
-import com.ctrip.framework.apollo.openapi.dto.OpenEnvClusterDTO;
-import com.ctrip.framework.apollo.openapi.dto.OpenItemDTO;
-import com.ctrip.framework.apollo.openapi.dto.OpenNamespaceDTO;
-import com.ctrip.framework.apollo.openapi.dto.OpenNamespaceLockDTO;
-import com.ctrip.framework.apollo.openapi.dto.OpenReleaseDTO;
+import com.ctrip.framework.apollo.openapi.dto.*;
 import com.google.common.base.Preconditions;
 import com.google.common.base.Strings;
 import com.google.common.collect.Lists;
@@ -160,6 +152,14 @@ public OpenItemDTO getItem(String appId, String env, String clusterName, String
     return itemService.getItem(appId, env, clusterName, namespaceName, key);
   }
 
+  /**
+   * Paging get configs
+   */
+  public OpenPageDTO<OpenItemDTO> findItemsByNamespace(String appId, String env, String clusterName,
+                                                       String namespaceName, int page, int size) {
+    return itemService.findItemsByNamespace(appId, env, clusterName, namespaceName, page, size);
+  }
+
   /**
    * Add config
    * @return the created config

apollo-openapi/src/main/java/com/ctrip/framework/apollo/openapi/client/service/AbstractOpenApiService.java

@@ -101,4 +101,12 @@ protected void checkNotEmpty(String value, String name) {
     Preconditions.checkArgument(!Strings.isNullOrEmpty(value), name + " should not be null or empty");
   }
 
+  protected void checkPage(int page) {
+    Preconditions.checkArgument(page >= 0, "page should be positive or 0");
+  }
+
+  protected void checkSize(int size) {
+    Preconditions.checkArgument(size > 0, "size should be positive number");
+  }
+
 }

apollo-openapi/src/main/java/com/ctrip/framework/apollo/openapi/client/service/ItemOpenApiService.java

@@ -20,15 +20,22 @@
 import com.ctrip.framework.apollo.openapi.client.exception.ApolloOpenApiException;
 import com.ctrip.framework.apollo.openapi.client.url.OpenApiPathBuilder;
 import com.ctrip.framework.apollo.openapi.dto.OpenItemDTO;
+import com.ctrip.framework.apollo.openapi.dto.OpenPageDTO;
 import com.google.common.base.Strings;
 import com.google.gson.Gson;
+import com.google.gson.reflect.TypeToken;
 import org.apache.http.client.methods.CloseableHttpResponse;
 import org.apache.http.impl.client.CloseableHttpClient;
 import org.apache.http.util.EntityUtils;
 
+import java.lang.reflect.Type;
+
 public class ItemOpenApiService extends AbstractOpenApiService implements
     com.ctrip.framework.apollo.openapi.api.ItemOpenApiService {
 
+  private static final Type OPEN_PAGE_DTO_OPEN_ITEM_DTO_TYPE_REFERENCE = new TypeToken<OpenPageDTO<OpenItemDTO>>() {
+  }.getType();
+
   public ItemOpenApiService(CloseableHttpClient client, String baseUrl, Gson gson) {
     super(client, baseUrl, gson);
   }
@@ -189,4 +196,36 @@ public void removeItem(String appId, String env, String clusterName, String name
     }
 
   }
+
+  @Override
+  public OpenPageDTO<OpenItemDTO> findItemsByNamespace(String appId, String env, String clusterName,
+                                                       String namespaceName, int page, int size) {
+    if (Strings.isNullOrEmpty(clusterName)) {
+      clusterName = ConfigConsts.CLUSTER_NAME_DEFAULT;
+    }
+    if (Strings.isNullOrEmpty(namespaceName)) {
+      namespaceName = ConfigConsts.NAMESPACE_APPLICATION;
+    }
+
+    checkNotEmpty(appId, "App id");
+    checkNotEmpty(env, "Env");
+    checkPage(page);
+    checkSize(size);
+
+    OpenApiPathBuilder pathBuilder = OpenApiPathBuilder.newBuilder()
+            .envsPathVal(env)
+            .appsPathVal(appId)
+            .clustersPathVal(clusterName)
+            .namespacesPathVal(namespaceName)
+            .itemsPathVal("")
+            .addParam("page", page)
+            .addParam("size", size);
+
+    try (CloseableHttpResponse response = get(pathBuilder)) {
+      return gson.fromJson(EntityUtils.toString(response.getEntity()), OPEN_PAGE_DTO_OPEN_ITEM_DTO_TYPE_REFERENCE);
+    } catch (Throwable ex) {
+      throw new RuntimeException(String.format("Paging get items: appId: %s, cluster: %s, namespace: %s in env: %s failed",
+              appId, clusterName, namespaceName, env), ex);
+    }
+  }
 }

apollo-openapi/src/main/java/com/ctrip/framework/apollo/openapi/dto/OpenPageDTO.java

@@ -0,0 +1,59 @@
+/*
+ * Copyright 2022 Apollo Authors
+ *
+ * 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.ctrip.framework.apollo.openapi.dto;
+
+import java.util.Collections;
+import java.util.List;
+
+/**
+ * @author mghio ([email protected])
+ */
+public class OpenPageDTO<T> {
+
+    private final int page;
+    private final int size;
+    private final long total;
+    private final List<T> content;
+
+    public OpenPageDTO(int page, int size, long total, List<T> content) {
+        this.page = page;
+        this.size = size;
+        this.total = total;
+        this.content = Collections.unmodifiableList(content);
+    }
+
+    public int getPage() {
+        return page;
+    }
+
+    public int getSize() {
+        return size;
+    }
+
+    public long getTotal() {
+        return total;
+    }
+
+    public List<T> getContent() {
+        return content;
+    }
+
+    public boolean hasContent() {
+        return content != null && content.size() > 0;
+    }
+
+}

apollo-openapi/src/test/java/com/ctrip/framework/apollo/openapi/client/service/ItemOpenApiServiceTest.java

@@ -236,4 +236,55 @@ public void testRemoveItemWithError() throws Exception {
 
     itemOpenApiService.removeItem(someAppId, someEnv, someCluster, someNamespace, someKey, someOperator);
   }
+
+  @Test
+  public void testFindItemsByNamespace() throws Exception {
+    final int page = 0;
+    final int size = 50;
+    final ArgumentCaptor<HttpGet> request = ArgumentCaptor.forClass(HttpGet.class);
+
+    itemOpenApiService.findItemsByNamespace(someAppId, someEnv, someCluster, someNamespace, page, size);
+
+    verify(httpClient, times(1)).execute(request.capture());
+
+    HttpGet get = request.getValue();
+
+    assertEquals(String.format("%s/envs/%s/apps/%s/clusters/%s/namespaces/%s/items?size=%s&page=%s",
+            someBaseUrl, someEnv, someAppId, someCluster, someNamespace, size, page), get.getURI().toString());
+  }
+
+  @Test(expected = RuntimeException.class)
+  public void testFindItemsByNamespaceWithError() {
+    final int page = 0;
+    final int size = 50;
+
+    when(statusLine.getStatusCode()).thenReturn(400);
+
+    itemOpenApiService.findItemsByNamespace(someAppId, someEnv, someCluster, someNamespace, page, size);
+  }
+
+  @Test(expected = IllegalArgumentException.class)
+  public void testFindItemsByNamespaceWithPageNegativeError() {
+    final int page = -1;
+    final int size = 50;
+
+    itemOpenApiService.findItemsByNamespace(someAppId, someEnv, someCluster, someNamespace, page, size);
+  }
+
+  @Test(expected = IllegalArgumentException.class)
+  public void testFindItemsByNamespaceWithSizeNegativeError() {
+    final int page = 0;
+    final int size = -50;
+
+    itemOpenApiService.findItemsByNamespace(someAppId, someEnv, someCluster, someNamespace, page, size);
+  }
+
+  @Test(expected = IllegalArgumentException.class)
+  public void testFindItemsByNamespaceWithPageAndSizeAllNegativeError() {
+    final int page = -1;
+    final int size = -50;
+
+    itemOpenApiService.findItemsByNamespace(someAppId, someEnv, someCluster, someNamespace, page, size);
+  }
+
 }

apollo-portal/src/main/java/com/ctrip/framework/apollo/openapi/server/service/ServerItemOpenApiService.java

@@ -17,8 +17,10 @@
 package com.ctrip.framework.apollo.openapi.server.service;
 
 import com.ctrip.framework.apollo.common.dto.ItemDTO;
+import com.ctrip.framework.apollo.common.dto.PageDTO;
 import com.ctrip.framework.apollo.openapi.api.ItemOpenApiService;
 import com.ctrip.framework.apollo.openapi.dto.OpenItemDTO;
+import com.ctrip.framework.apollo.openapi.dto.OpenPageDTO;
 import com.ctrip.framework.apollo.openapi.util.OpenApiBeanUtils;
 import com.ctrip.framework.apollo.portal.environment.Env;
 import com.ctrip.framework.apollo.portal.service.ItemService;
@@ -99,4 +101,14 @@ public void removeItem(String appId, String env, String clusterName, String name
     ItemDTO toDeleteItem = this.itemService.loadItem(Env.valueOf(env), appId, clusterName, namespaceName, key);
     this.itemService.deleteItem(Env.valueOf(env), toDeleteItem.getId(), operator);
   }
+
+  @Override
+  public OpenPageDTO<OpenItemDTO> findItemsByNamespace(String appId, String env, String clusterName,
+                                                       String namespaceName, int page, int size) {
+    PageDTO<OpenItemDTO> commonOpenItemDTOPage =
+            this.itemService.findItemsByNamespace(appId, Env.valueOf(env), clusterName, namespaceName, page, size);
+
+    return new OpenPageDTO<>(commonOpenItemDTOPage.getPage(), commonOpenItemDTOPage.getSize(),
+            commonOpenItemDTOPage.getTotal(), commonOpenItemDTOPage.getContent());
+  }
 }