Java tutorial
/* * * 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 edu.nwpu.gemfire.monitor.service; import java.text.DecimalFormat; import java.util.ArrayList; import java.util.Collections; import java.util.Comparator; import java.util.List; import java.util.Map; import javax.servlet.http.HttpServletRequest; import org.springframework.context.annotation.Scope; import org.springframework.stereotype.Component; import org.springframework.stereotype.Service; import com.fasterxml.jackson.databind.ObjectMapper; import com.fasterxml.jackson.databind.node.ArrayNode; import com.fasterxml.jackson.databind.node.ObjectNode; import edu.nwpu.gemfire.monitor.controllers.PulseController; import edu.nwpu.gemfire.monitor.data.Cluster; import edu.nwpu.gemfire.monitor.data.PulseConstants; import edu.nwpu.gemfire.monitor.data.Repository; import edu.nwpu.gemfire.monitor.util.StringUtils; /** * Class ClusterRegionsService * * This class contains implementations of getting Cluster's regions details * * @author Sachin K * @since version 7.5 */ @Component @Service("ClusterRegions") @Scope("singleton") public class ClusterRegionsService implements PulseService { private final ObjectMapper mapper = new ObjectMapper(); // String constants used for forming a json response private final String ENTRY_SIZE = "entrySize"; // Comparator based upon regions entry count private static Comparator<Cluster.Region> regionEntryCountComparator = (r1, r2) -> { long r1Cnt = r1.getSystemRegionEntryCount(); long r2Cnt = r2.getSystemRegionEntryCount(); if (r1Cnt < r2Cnt) { return -1; } else if (r1Cnt > r2Cnt) { return 1; } else { return 0; } }; public ObjectNode execute(final HttpServletRequest request) throws Exception { // get cluster object Cluster cluster = Repository.get().getCluster(); // json object to be sent as response ObjectNode responseJSON = mapper.createObjectNode(); // getting cluster's Regions responseJSON.put("regions", getRegionJson(cluster)); // Send json response return responseJSON; } /** * This method is used to get various regions associated with the given * cluster and create json for each region fields and returns Array List for * all the regions associated with given cluster * * @param cluster * @return JSONObject Array List */ private ArrayNode getRegionJson(Cluster cluster) { Long totalHeapSize = cluster.getTotalHeapSize(); Long totalDiskUsage = cluster.getTotalBytesOnDisk(); Map<String, Cluster.Region> clusterRegions = cluster.getClusterRegions(); List<Cluster.Region> clusterRegionsList = new ArrayList<Cluster.Region>(); clusterRegionsList.addAll(clusterRegions.values()); Collections.sort(clusterRegionsList, regionEntryCountComparator); ArrayNode regionListJson = mapper.createArrayNode(); for (int count = 0; count < clusterRegionsList.size(); count++) { Cluster.Region reg = clusterRegionsList.get(count); ObjectNode regionJSON = mapper.createObjectNode(); regionJSON.put("name", reg.getName()); regionJSON.put("totalMemory", totalHeapSize); regionJSON.put("systemRegionEntryCount", reg.getSystemRegionEntryCount()); regionJSON.put("memberCount", reg.getMemberCount()); final String regionType = reg.getRegionType(); regionJSON.put("type", regionType); regionJSON.put("getsRate", reg.getGetsRate()); regionJSON.put("putsRate", reg.getPutsRate()); Cluster.Member[] clusterMembersList = cluster.getMembers(); ArrayNode memberNameArray = mapper.createArrayNode(); for (String memberName : reg.getMemberName()) { for (Cluster.Member member : clusterMembersList) { String name = member.getName(); name = name.replace(":", "-"); String id = member.getId(); id = id.replace(":", "-"); if ((memberName.equals(id)) || (memberName.equals(name))) { ObjectNode regionMember = mapper.createObjectNode(); regionMember.put("id", member.getId()); regionMember.put("name", member.getName()); memberNameArray.add(regionMember); break; } } } regionJSON.put("memberNames", memberNameArray); regionJSON.put("entryCount", reg.getSystemRegionEntryCount()); Boolean persistent = reg.getPersistentEnabled(); if (persistent) { regionJSON.put("persistence", this.VALUE_ON); } else { regionJSON.put("persistence", this.VALUE_OFF); } Boolean isEnableOffHeapMemory = reg.isEnableOffHeapMemory(); if (isEnableOffHeapMemory) { regionJSON.put("isEnableOffHeapMemory", this.VALUE_ON); } else { regionJSON.put("isEnableOffHeapMemory", this.VALUE_OFF); } Boolean isHDFSWriteOnly = reg.isHdfsWriteOnly(); if (regionType.startsWith("HDFS")) { if (isHDFSWriteOnly) { regionJSON.put("isHDFSWriteOnly", this.VALUE_ON); } else { regionJSON.put("isHDFSWriteOnly", this.VALUE_OFF); } } else { regionJSON.put("isHDFSWriteOnly", this.VALUE_NA); } String regCompCodec = reg.getCompressionCodec(); if (StringUtils.isNotNullNotEmptyNotWhiteSpace(regCompCodec)) { regionJSON.put("compressionCodec", reg.getCompressionCodec()); } else { regionJSON.put("compressionCodec", this.VALUE_NA); } if (PulseConstants.PRODUCT_NAME_SQLFIRE.equalsIgnoreCase(PulseController.getPulseProductSupport())) { // Convert region path to dot separated region path regionJSON.put("regionPath", StringUtils.getTableNameFromRegionName(reg.getFullPath())); regionJSON.put("id", StringUtils.getTableNameFromRegionName(reg.getFullPath())); } else { regionJSON.put("regionPath", reg.getFullPath()); regionJSON.put("id", reg.getFullPath()); } regionJSON.put("memoryReadsTrend", mapper.valueToTree(reg.getRegionStatisticTrend(Cluster.Region.REGION_STAT_GETS_PER_SEC_TREND))); regionJSON.put("memoryWritesTrend", mapper.valueToTree(reg.getRegionStatisticTrend(Cluster.Region.REGION_STAT_PUTS_PER_SEC_TREND))); regionJSON.put("diskReadsTrend", mapper .valueToTree(reg.getRegionStatisticTrend(Cluster.Region.REGION_STAT_DISK_READS_PER_SEC_TREND))); regionJSON.put("diskWritesTrend", mapper.valueToTree( reg.getRegionStatisticTrend(Cluster.Region.REGION_STAT_DISK_WRITES_PER_SEC_TREND))); regionJSON.put("emptyNodes", reg.getEmptyNode()); Long entrySize = reg.getEntrySize(); DecimalFormat form = new DecimalFormat(PulseConstants.DECIMAL_FORMAT_PATTERN_2); String entrySizeInMB = form.format(entrySize / (1024f * 1024f)); if (entrySize < 0) { regionJSON.put(this.ENTRY_SIZE, this.VALUE_NA); } else { regionJSON.put(this.ENTRY_SIZE, entrySizeInMB); } regionJSON.put("dataUsage", reg.getDiskUsage()); regionJSON.put("wanEnabled", reg.getWanEnabled()); regionJSON.put("totalDataUsage", totalDiskUsage); regionJSON.put("memoryUsage", entrySizeInMB); regionListJson.add(regionJSON); } return regionListJson; } }