CB-4122. Rare example for gql multipart

server/bundles/io.cloudbeaver.service.data.transfer/src/io/cloudbeaver/service/data/transfer/graphql/upload/AbstractGraphQLHttpServlet.java

@@ -0,0 +1,96 @@
+/*
+ * DBeaver - Universal Database Manager
+ * Copyright (C) 2010-2024 DBeaver Corp and others
+ *
+ * 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 io.cloudbeaver.service.data.transfer.graphql.upload;
+
+import graphql.ExecutionResult;
+import graphql.schema.GraphQLFieldDefinition;
+import jakarta.servlet.Servlet;
+import jakarta.servlet.http.HttpServlet;
+import jakarta.servlet.http.HttpServletRequest;
+import jakarta.servlet.http.HttpServletResponse;
+
+
+public abstract class AbstractGraphQLHttpServlet extends HttpServlet
+    implements Servlet, GraphQLMBean {
+
+  protected abstract GraphQLConfiguration getConfiguration();
+
+  public void addListener(GraphQLServletListener servletListener) {
+    getConfiguration().add(servletListener);
+  }
+
+  public void removeListener(GraphQLServletListener servletListener) {
+    getConfiguration().remove(servletListener);
+  }
+
+  @Override
+  public String[] getQueries() {
+    return getConfiguration()
+        .getInvocationInputFactory()
+        .getSchemaProvider()
+        .getSchema()
+        .getQueryType()
+        .getFieldDefinitions()
+        .stream()
+        .map(GraphQLFieldDefinition::getName)
+        .toArray(String[]::new);
+  }
+
+  @Override
+  public String[] getMutations() {
+    return getConfiguration()
+        .getInvocationInputFactory()
+        .getSchemaProvider()
+        .getSchema()
+        .getMutationType()
+        .getFieldDefinitions()
+        .stream()
+        .map(GraphQLFieldDefinition::getName)
+        .toArray(String[]::new);
+  }
+
+  @Override
+  public String executeQuery(String query) {
+    try {
+      GraphQLRequest graphQLRequest = createQueryOnlyRequest(query);
+      GraphQLSingleInvocationInput invocationInput =
+          getConfiguration().getInvocationInputFactory().create(graphQLRequest);
+      ExecutionResult result =
+          getConfiguration().getGraphQLInvoker().query(invocationInput).getResult();
+      return getConfiguration().getObjectMapper().serializeResultAsJson(result);
+    } catch (Exception e) {
+      return e.getMessage();
+    }
+  }
+
+  @Override
+  protected void doGet(HttpServletRequest req, HttpServletResponse resp) {
+    doRequest(req, resp);
+  }
+
+  @Override
+  protected void doPost(HttpServletRequest req, HttpServletResponse resp) {
+    doRequest(req, resp);
+  }
+
+  private void doRequest(HttpServletRequest request, HttpServletResponse response) {
+    try {
+      getConfiguration().getHttpRequestHandler().handle(request, response);
+    } catch (Exception t) {
+    }
+  }
+}

server/bundles/io.cloudbeaver.service.data.transfer/src/io/cloudbeaver/service/data/transfer/graphql/upload/FileDataFetcher.java

@@ -0,0 +1,32 @@
+/*
+ * DBeaver - Universal Database Manager
+ * Copyright (C) 2010-2024 DBeaver Corp and others
+ *
+ * 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 io.cloudbeaver.service.data.transfer.graphql.upload;
+
+import graphql.schema.DataFetcher;
+import graphql.schema.DataFetchingEnvironment;
+
+import java.io.InputStream;
+
+public class FileDataFetcher implements DataFetcher<Object> {
+
+    @Override
+    public Object get(DataFetchingEnvironment environment) {
+        InputStream fileContent = environment.getArgument("file");
+        // do save here (no real implementation)
+        return new FileMetadata("file-id", "file-name");
+    }
+}

server/bundles/io.cloudbeaver.service.data.transfer/src/io/cloudbeaver/service/data/transfer/graphql/upload/FileMetadata.java

@@ -0,0 +1,35 @@
+/*
+ * DBeaver - Universal Database Manager
+ * Copyright (C) 2010-2024 DBeaver Corp and others
+ *
+ * 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 io.cloudbeaver.service.data.transfer.graphql.upload;
+
+public class FileMetadata {
+    private String id;
+    private String name;
+
+    public FileMetadata(String id, String name) {
+        this.id = id;
+        this.name = name;
+    }
+
+    public String getId() {
+        return id;
+    }
+
+    public String getName() {
+        return name;
+    }
+}