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---get---数据量："+dataNum+"------");
for(String mapType : testMap.keySet()) {
putGetMapTest(mapType, testMap.get(mapType), dataMap, false);
}
for(DB db : dbList) {
db.close();
}
}
/**
* putGet测试
* @param map
* @param dataMap
* @param put
* @return <耗时, 异常数>
*/
public static TwoTuple<Long, Long> putGetMapTest(String mapType, Map<String, Long> map, Map<String, Long> dataMap, boolean put) {
long useTime = 0L;
long errorNum = 0L;
Iterator<Entry<String, Long>> entryIt = dataMap.entrySet().iterator();
while(entryIt.hasNext()) {
Entry<String, Long> entry = entryIt.next();
if(put) {
long t1 = System.nanoTime();
map.put(entry.getKey(), entry.getValue());
useTime = System.nanoTime() - t1;
} else {
long t1 = System.nanoTime();
long val = map.get(entry.getKey());
useTime = System.nanoTime() - t1;
if(val != entry.getValue()) {
errorNum++;
}
}
}
double avgUseTime = (double)useTime / dataMap.size();
String fmtStr = "map类型：%s，总耗时：%dns，平均耗时%ens，异常数量：%d";
System.out.println(String.format(fmtStr, mapType, useTime, avgUseTime, errorNum));
return new TwoTuple<Long, Long>(useTime, errorNum);
}
/**
* 生成测试数据
* @param size
* @return
*/
public static Map<String, Long> generateTestData(int size) {
Map<String, Long> map = new HashMap();
int arrLength = 26;
char[] words = new char[arrLength];
for(int i=0; i<arrLength; i++) {
words[i] = (char) ('a' + i);
}
System.out.println(words);
String demoWord = new String(words);
for(int i=0; i<size; i++) {
String key = demoWord.substring(i%arrLength, i%arrLength) + i;
long val = i;
map.put(key, val);
}
return map;
}
/**
* 对外内存map
*/
public static void offHeapMapTest1() {
DB db = DBMaker.memoryDB().make();
ConcurrentMap map = db.hashMap("map").createOrOpen();
map.put(DEMO_KEY, DEMO_VAL);
System.out.println("第1次取值，" + map.get(DEMO_KEY));
}
/**
* 基于磁盘的存储
*/
public static void fileMapTest1() {
DB db = DBMaker.fileDB("file.db").make();
ConcurrentMap map = db.hashMap("map").createOrOpen();
map.put(DEMO_KEY, DEMO_VAL);
System.out.println("第1次取值，" +map.get(DEMO_KEY));
db.close();
System.out.println("----------重新打开----------");
db = DBMaker.fileDB("file.db").make();
map = db.hashMap("map").createOrOpen();
System.out.println("第2次取值，" +map.get(DEMO_KEY));
db.close();
}
/**
* 在64位操作系统中，开启内存映射
* 个性化序列化
*/
public static void fileMapMemoryMapTest() {
DB db = DBMaker
.fileDB("file.db")
.fileMmapEnable()
.make();
ConcurrentMap<String,Long> map = db
.hashMap("mapsl", Serializer.STRING, Serializer.LONG)
.createOrOpen();
long val = 51;
map.put(DEMO_KEY, val);
System.out.println("第1次取值，期望值：" + val + "，取到的值：" +map.get(DEMO_KEY));
db.close();
db = DBMaker
.fileDB("file.db")
.fileMmapEnable()
.make();
map = db.hashMap("mapsl", Serializer.STRING, Serializer.LONG)
.createOrOpen();
System.out.println("第2次取值，期望值：" + val + "，取到的值：" +map.get(DEMO_KEY));
db.close();
}
}
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