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优化录像列表获取算法

pull/33/head
Lawrence 4 years ago
parent
commit
dc1d9646a9
  1. 4
      .gitignore
  2. 38
      src/main/java/com/genersoft/iot/vmp/gb28181/transmit/request/impl/MessageRequestProcessor.java

4
.gitignore

@ -9,7 +9,7 @@
# Mobile Tools for Java (J2ME) # Mobile Tools for Java (J2ME)
.mtj.tmp/ .mtj.tmp/
src/main/resources/application-*.yml
# Package Files # # Package Files #
#*.jar #*.jar
*.war *.war
@ -18,7 +18,7 @@
*.zip *.zip
*.tar.gz *.tar.gz
*.rar *.rar
*.iml
# virtual machine crash logs, see http://www.java.com/en/download/help/error_hotspot.xml # virtual machine crash logs, see http://www.java.com/en/download/help/error_hotspot.xml
hs_err_pid* hs_err_pid*
/.idea/* /.idea/*

38
src/main/java/com/genersoft/iot/vmp/gb28181/transmit/request/impl/MessageRequestProcessor.java

@ -342,6 +342,7 @@ public class MessageRequestProcessor extends SIPRequestAbstractProcessor {
try { try {
// 回复200 OK // 回复200 OK
responseAck(evt); responseAck(evt);
String seqNo = String.valueOf(System.currentTimeMillis());
RecordInfo recordInfo = new RecordInfo(); RecordInfo recordInfo = new RecordInfo();
Element rootElement = getRootElement(evt); Element rootElement = getRootElement(evt);
Element deviceIdElement = rootElement.element("DeviceID"); Element deviceIdElement = rootElement.element("DeviceID");
@ -396,32 +397,22 @@ public class MessageRequestProcessor extends SIPRequestAbstractProcessor {
if (recordInfo.getSumNum() > 0 && recordList.size() > 0 && recordList.size() < recordInfo.getSumNum()) { if (recordInfo.getSumNum() > 0 && recordList.size() > 0 && recordList.size() < recordInfo.getSumNum()) {
// 为防止连续请求该设备的录像数据,返回数据错乱,特增加sn进行区分 // 为防止连续请求该设备的录像数据,返回数据错乱,特增加sn进行区分
String cacheKey = CACHE_RECORDINFO_KEY + deviceId + sn; String cacheKey = CACHE_RECORDINFO_KEY + deviceId + sn;
// TODO 暂时直接操作redis存储,后续封装专用缓存接口,改为本地内存缓存
if (redis.hasKey(cacheKey)) {
List<RecordItem> previousList = (List<RecordItem>) redis.get(cacheKey);
if (previousList != null && previousList.size() > 0) {
recordList.addAll(previousList);
}
// 本分支表示录像列表被拆包,且加上之前的数据还是不够,保存缓存返回,等待下个包再处理
if (recordList.size() < recordInfo.getSumNum()) {
logger.info("已获取" + recordList.size() + "项录像数据,共" + recordInfo.getSumNum() + "项");
redis.set(cacheKey, recordList, 90);
return;
} else {
// 本分支表示录像被拆包,但加上之前的数据够足够,返回响应
// 因设备心跳有监听redis过期机制,为提高性能,此处手动删除
logger.info("录像数据已全部获取");
redis.del(cacheKey);
}
} else {
// 本分支有两种可能:1、录像列表被拆包,且是第一个包,直接保存缓存返回,等待下个包再处理
// 2、之前有包,但超时清空了,那么这次sn批次的响应数据已经不完整,等待过期时间后redis自动清空数据
logger.info("已获取" + recordList.size() + "项录像数据,共" + recordInfo.getSumNum() + "项");
logger.info("等待后续的包...");
redis.set(cacheKey, recordList, 90); redis.set(cacheKey + "_" + seqNo, recordList, 90);
List<Object> cacheKeys = redis.scan(cacheKey + "_*");
List<RecordItem> totalRecordList = new ArrayList<RecordItem>();
for (int i = 0; i < cacheKeys.size(); i++) {
totalRecordList.addAll((List<RecordItem>) redis.get(cacheKeys.get(i).toString()));
}
if (totalRecordList.size() < recordInfo.getSumNum()) {
logger.info("已获取" + totalRecordList.size() + "项录像数据,共" + recordInfo.getSumNum() + "项");
return; return;
} }
logger.info("录像数据已全部获取,共" + recordInfo.getSumNum() + "项");
recordInfo.setRecordList(totalRecordList);
for (int i = 0; i < cacheKeys.size(); i++) {
redis.del(cacheKeys.get(i).toString());
}
} }
// 自然顺序排序, 元素进行升序排列 // 自然顺序排序, 元素进行升序排列
recordInfo.getRecordList().sort(Comparator.naturalOrder()); recordInfo.getRecordList().sort(Comparator.naturalOrder());
@ -460,7 +451,6 @@ public class MessageRequestProcessor extends SIPRequestAbstractProcessor {
cmder.streamByeCmd(streamInfo.getStreamId()); cmder.streamByeCmd(streamInfo.getStreamId());
} }
} }
} catch (ParseException | SipException | InvalidArgumentException | DocumentException e) { } catch (ParseException | SipException | InvalidArgumentException | DocumentException e) {
e.printStackTrace(); e.printStackTrace();
} }

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