com.linkedin.pinot.server.api.resources.MmapDebugResource.java Source code

Introduction

Here is the source code for com.linkedin.pinot.server.api.resources.MmapDebugResource.java

Source

/**
 * Copyright (C) 2014-2016 LinkedIn Corp. (pinot-core@linkedin.com)
 *
 * 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.linkedin.pinot.server.api.resources;

import java.util.ArrayList;
import java.util.HashMap;
import java.util.List;
import java.util.Map;
import org.apache.commons.lang3.tuple.Pair;
import org.codehaus.jackson.annotate.JsonIgnoreProperties;
import org.restlet.resource.ResourceException;
import com.linkedin.pinot.common.utils.MmapUtils;
import io.swagger.annotations.Api;
import io.swagger.annotations.ApiOperation;
import io.swagger.annotations.ApiResponse;
import io.swagger.annotations.ApiResponses;
import javax.ws.rs.GET;
import javax.ws.rs.Path;
import javax.ws.rs.Produces;
import javax.ws.rs.core.MediaType;

/**
 * Debug endpoint to check memory allocation.
 */
@Api(value = "debug", description = "Debug information", tags = "Debug")
@Path("debug")
public class MmapDebugResource {

    @JsonIgnoreProperties(ignoreUnknown = true)
    public static class AllocationInfo {
        public String context;
        public String type;
        public int size;
    }

    @GET
    @Path("memory/offheap")
    @ApiOperation(value = "View current off-heap allocations", notes = "Lists all off-heap allocations and their associated sizes")
    @ApiResponses(value = { @ApiResponse(code = 200, message = "Success") })
    @Produces(MediaType.APPLICATION_JSON)
    public Map<String, List<AllocationInfo>> getOffHeapSizes() throws ResourceException {
        List<AllocationInfo> allocations = new ArrayList<>();

        List<Pair<MmapUtils.AllocationContext, Integer>> allocationsMap = MmapUtils.getAllocationsAndSizes();

        for (Pair<MmapUtils.AllocationContext, Integer> allocation : allocationsMap) {
            AllocationInfo info = new AllocationInfo();
            info.context = allocation.getKey().getContext();
            info.type = allocation.getKey().getContext();
            info.size = allocation.getValue();
            allocations.add(info);
        }
        Map<String, List<AllocationInfo>> allocationMap = new HashMap<>();
        allocationMap.put("allocations", allocations);
        return allocationMap;
    }
}