docs/_docs/code-snippets/java/src/main/java/org/apache/ignite/snippets/services/EchoServiceImpl.java

/*
 * 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 org.apache.ignite.examples;

import org.apache.ignite.resources.ServiceContextResource;
import org.apache.ignite.services.ServiceCallContext;
import org.apache.ignite.services.ServiceContext;

public class EchoServiceImpl implements EchoService {
    /** Serial version UID. */
    private static final long serialVersionUID = 0L;

    //tag::service-call-context-read[]
    @ServiceContextResource
    private ServiceContext ctx;

    /** {@inheritDoc} */
    @Override public String hello() {
        ServiceCallContext callCtx = ctx.currentCallContext();

        String proxyUser = callCtx != null ? callCtx.attribute("user") : null;

        return String.format("Hello %s!", (proxyUser == null || proxyUser.isEmpty() ? "anonymous" : proxyUser));
    }
    //end::service-call-context-read[]
}