Support cross-database ability for more interfaces

sdk-core/src/main/java/io/milvus/v2/client/MilvusClientV2.java

@@ -306,12 +306,22 @@ public static CreateCollectionReq.CollectionSchema CreateSchema() {
     }
 
     /**
-     * list milvus collections
+     * List milvus collections in the current database of the connection
      *
      * @return List of String collection names
      */
     public ListCollectionsResp listCollections() {
-        return rpcUtils.retry(()-> collectionService.listCollections(this.getRpcStub()));
+        return rpcUtils.retry(()-> collectionService.listCollections(this.getRpcStub(), ""));
+    }
+    /**
+     * List milvus collections, can specify the target database
+     * Note: the old API listCollections() doesn't have a ListCollectionsReq argument, we have to create
+     * this new V2 API to avoid incompatible issue.
+     *
+     * @return List of String collection names
+     */
+    public ListCollectionsResp listCollectionsV2(ListCollectionsReq request) {
+        return rpcUtils.retry(()-> collectionService.listCollections(this.getRpcStub(), request.getDatabaseName()));
     }
     /**
      * Drops a collection in Milvus.

sdk-core/src/main/java/io/milvus/v2/service/collection/request/GetCollectionStatsReq.java

@@ -25,5 +25,6 @@
 @Data
 @SuperBuilder
 public class GetCollectionStatsReq {
+    private String databaseName;
     private String collectionName;
 }

sdk-core/src/main/java/io/milvus/v2/service/collection/request/GetLoadStateReq.java

@@ -25,6 +25,7 @@
 @Data
 @SuperBuilder
 public class GetLoadStateReq {
+    private String databaseName;
     private String collectionName;
     private String partitionName;
 }

sdk-core/src/main/java/io/milvus/v2/service/collection/request/HasCollectionReq.java

@@ -25,5 +25,6 @@
 @Data
 @SuperBuilder
 public class HasCollectionReq {
+    private String databaseName;
     private String collectionName;
 }

sdk-core/src/main/java/io/milvus/v2/service/collection/request/ListCollectionsReq.java

@@ -0,0 +1,85 @@
+/*
+ * Licensed to the Apache Software Foundation (ASF) under one
+ * or more contributor license agreements.  See the NOTICE file
+ * distributed with this work for additional information
+ * regarding copyright ownership.  The ASF licenses this file
+ * 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 CONDITIONS OF ANY
+ * KIND, either express or implied.  See the License for the
+ * specific language governing permissions and limitations
+ * under the License.
+ */
+
+package io.milvus.v2.service.collection.request;
+
+import org.apache.commons.lang3.builder.EqualsBuilder;
+
+import java.util.Objects;
+
+public class ListCollectionsReq {
+    private String databaseName;
+
+    private ListCollectionsReq(Builder builder) {
+        this.databaseName = builder.databaseName;
+    }
+
+    public static Builder builder() {
+        return new Builder();
+    }
+
+    // Getters
+    public String getDatabaseName() {
+        return databaseName;
+    }
+
+    // Setters
+    public void setDatabaseName(String databaseName) {
+        this.databaseName = databaseName;
+    }
+
+    @Override
+    public boolean equals(Object obj) {
+        if (this == obj) return true;
+        if (obj == null || getClass() != obj.getClass()) return false;
+
+        ListCollectionsReq that = (ListCollectionsReq) obj;
+
+        return new EqualsBuilder()
+                .append(databaseName, that.databaseName)
+                .isEquals();
+    }
+
+    @Override
+    public int hashCode() {
+        return Objects.hash(databaseName);
+    }
+
+    @Override
+    public String toString() {
+        return "ListCollectionsReq{" +
+                "databaseName='" + databaseName +
+                '}';
+    }
+
+    public static class Builder {
+        private String databaseName;
+
+        private Builder() {}
+
+        public Builder databaseName(String databaseName) {
+            this.databaseName = databaseName;
+            return this;
+        }
+
+        public ListCollectionsReq build() {
+            return new ListCollectionsReq(this);
+        }
+    }
+}

sdk-core/src/main/java/io/milvus/v2/service/collection/request/ReleaseCollectionReq.java

@@ -26,6 +26,7 @@
 @Data
 @SuperBuilder
 public class ReleaseCollectionReq {
+    private String databaseName;
     private String collectionName;
     @Deprecated
     @Builder.Default

sdk-core/src/main/java/io/milvus/v2/service/collection/request/RenameCollectionReq.java

@@ -25,6 +25,7 @@
 @Data
 @SuperBuilder
 public class RenameCollectionReq {
+    private String databaseName;
     private String collectionName;
     private String newCollectionName;
 }

sdk-core/src/main/java/io/milvus/v2/service/database/DatabaseService.java

@@ -32,7 +32,7 @@
 
 public class DatabaseService extends BaseService {
     public Void createDatabase(MilvusServiceGrpc.MilvusServiceBlockingStub blockingStub, CreateDatabaseReq request) {
-        String title = String.format("CreateDatabaseRequest databaseName:%s", request.getDatabaseName());
+        String title = String.format("Create database: '%s'", request.getDatabaseName());
         CreateDatabaseRequest.Builder builder = CreateDatabaseRequest.newBuilder()
                 .setDbName(request.getDatabaseName());
         List<KeyValuePair> propertiesList = ParamUtils.AssembleKvPair(request.getProperties());
@@ -46,7 +46,7 @@ public Void createDatabase(MilvusServiceGrpc.MilvusServiceBlockingStub blockingS
     }
 
     public Void dropDatabase(MilvusServiceGrpc.MilvusServiceBlockingStub blockingStub, DropDatabaseReq request) {
-        String title = String.format("DropDatabaseRequest databaseName:%s", request.getDatabaseName());
+        String title = String.format("Drop database: '%s'", request.getDatabaseName());
         DropDatabaseRequest rpcRequest = DropDatabaseRequest.newBuilder()
                 .setDbName(request.getDatabaseName())
                 .build();
@@ -58,6 +58,7 @@ public Void dropDatabase(MilvusServiceGrpc.MilvusServiceBlockingStub blockingStu
 
     public ListDatabasesResp listDatabases(MilvusServiceGrpc.MilvusServiceBlockingStub blockingStub) {
         ListDatabasesResponse response = blockingStub.listDatabases(ListDatabasesRequest.newBuilder().build());
+        rpcUtils.handleResponse("List databases", response.getStatus());
         ListDatabasesResp listDatabasesResp = ListDatabasesResp.builder()
                 .databaseNames(response.getDbNamesList())
                 .build();
@@ -66,7 +67,7 @@ public ListDatabasesResp listDatabases(MilvusServiceGrpc.MilvusServiceBlockingSt
     }
 
     public Void alterDatabaseProperties(MilvusServiceGrpc.MilvusServiceBlockingStub blockingStub, AlterDatabasePropertiesReq request) {
-        String title = String.format("AlterDatabasePropertiesReq databaseName:%s", request.getDatabaseName());
+        String title = String.format("Alter properties of database: '%s'", request.getDatabaseName());
         AlterDatabaseRequest.Builder builder = AlterDatabaseRequest.newBuilder()
                 .setDbName(request.getDatabaseName());
         List<KeyValuePair> propertiesList = ParamUtils.AssembleKvPair(request.getProperties());
@@ -80,7 +81,7 @@ public Void alterDatabaseProperties(MilvusServiceGrpc.MilvusServiceBlockingStub
     }
 
     public Void dropDatabaseProperties(MilvusServiceGrpc.MilvusServiceBlockingStub blockingStub, DropDatabasePropertiesReq request) {
-        String title = String.format("DropDatabasePropertiesReq databaseName:%s", request.getDatabaseName());
+        String title = String.format("Drop properties of database: '%s'", request.getDatabaseName());
         AlterDatabaseRequest.Builder builder = AlterDatabaseRequest.newBuilder()
                 .setDbName(request.getDatabaseName())
                 .addAllDeleteKeys(request.getPropertyKeys());
@@ -91,7 +92,7 @@ public Void dropDatabaseProperties(MilvusServiceGrpc.MilvusServiceBlockingStub b
     }
 
     public DescribeDatabaseResp describeDatabase(MilvusServiceGrpc.MilvusServiceBlockingStub blockingStub, DescribeDatabaseReq request) {
-        String title = String.format("DescribeDatabaseRequest databaseName:%s", request.getDatabaseName());
+        String title = String.format("Describe database: '%s'", request.getDatabaseName());
         DescribeDatabaseRequest rpcRequest = DescribeDatabaseRequest.newBuilder()
                 .setDbName(request.getDatabaseName())
                 .build();