io.druid.server.namespace.http.NamespacesCacheResource.java Source code

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Here is the source code for io.druid.server.namespace.http.NamespacesCacheResource.java

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/*
 * Licensed to Metamarkets Group Inc. (Metamarkets) under one
 * or more contributor license agreements.  See the NOTICE file
 * distributed with this work for additional information
 * regarding copyright ownership.  Metamarkets 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.druid.server.namespace.http;

import com.fasterxml.jackson.jaxrs.smile.SmileMediaTypes;
import com.google.common.base.Strings;
import com.google.inject.Inject;
import com.metamx.common.logger.Logger;
import io.druid.server.namespace.cache.NamespaceExtractionCacheManager;

import javax.ws.rs.GET;
import javax.ws.rs.Path;
import javax.ws.rs.Produces;
import javax.ws.rs.core.MediaType;
import javax.ws.rs.core.Response;

@Path("/druid/v1/namespaces")
public class NamespacesCacheResource {
    private static final Logger log = new Logger(NamespacesCacheResource.class);
    private final NamespaceExtractionCacheManager namespaceExtractionCacheManager;

    @Inject
    public NamespacesCacheResource(final NamespaceExtractionCacheManager namespaceExtractionCacheManager) {
        this.namespaceExtractionCacheManager = namespaceExtractionCacheManager;
    }

    @GET
    @Produces({ MediaType.APPLICATION_JSON, SmileMediaTypes.APPLICATION_JACKSON_SMILE })
    public Response getNamespaces() {
        try {
            return Response.ok().entity(namespaceExtractionCacheManager.getKnownNamespaces()).build();
        } catch (Exception ex) {
            log.error("Can not get the list of known namespaces");
            return Response.serverError().entity(Strings.nullToEmpty(ex.getMessage())).build();
        }
    }
}