本文整理汇总了Java中org.rrd4j.core.FetchData类的典型用法代码示例。如果您正苦于以下问题：Java FetchData类的具体用法？Java FetchData怎么用？Java FetchData使用的例子？那么恭喜您, 这里精选的类代码示例或许可以为您提供帮助。
FetchData类属于org.rrd4j.core包，在下文中一共展示了FetchData类的5个代码示例，这些例子默认根据受欢迎程度排序。您可以为喜欢或者感觉有用的代码点赞，您的评价将有助于系统推荐出更棒的Java代码示例。
示例1: query
import org.rrd4j.core.FetchData; //导入依赖的package包/类
public double query(String dsName, long startTimestamp, long endTimestamp, ConsolFun consolidationFunction) {
long tStart = convertToUnixTimestamp(startTimestamp);
long tEnd = convertToUnixTimestamp(endTimestamp);
if (tStart == tEnd) {
this.logger.warn("Shifting end time by 1 second because it is identical with the start time.");
tEnd++;
}
try {
final FetchRequest request = this.rrdDb.createFetchRequest(consolidationFunction, tStart, tEnd);
final FetchData fetchData = request.fetchData();
return fetchData.getAggregate(dsName, consolidationFunction);
} catch (IOException e) {
e.printStackTrace();
return Double.NaN;
}
}
示例2: addRrdData
import org.rrd4j.core.FetchData; //导入依赖的package包/类
private Map<Long, ArrayList<String>> addRrdData(
Map<Long, ArrayList<String>> data, String itemName,
ConsolFun consilidationFunction, Date timeBegin, Date timeEnd,
long resolution) throws IOException {
RrdDb rrdDb = new RrdDb(RRD_FOLDER + File.separator + itemName + ".rrd");
FetchRequest fetchRequest = rrdDb.createFetchRequest(
consilidationFunction, Util.getTimestamp(timeBegin),
Util.getTimestamp(timeEnd), resolution);
FetchData fetchData = fetchRequest.fetchData();
// logger.info(fetchData.toString());
long[] timestamps = fetchData.getTimestamps();
double[][] values = fetchData.getValues();
logger.debug("RRD fetch returned '{}' rows and '{}' columns",
fetchData.getRowCount(), fetchData.getColumnCount());
for (int row = 0; row < fetchData.getRowCount(); row++) {
// change to microseconds
long time = timestamps[row] * 1000L;
if (!data.containsKey(time)) {
data.put(time, new ArrayList<String>());
}
ArrayList<String> vals = data.get(time);
int indexOffset = vals.size();
for (int dsIndex = 0; dsIndex < fetchData.getColumnCount(); dsIndex++) {
vals.add(dsIndex + indexOffset,
formatDouble(values[dsIndex][row], "null", true));
}
}
rrdDb.close();
return data;
}
示例3: addRrdData
import org.rrd4j.core.FetchData; //导入依赖的package包/类
private Map<Long, ArrayList<String>> addRrdData(Map<Long, ArrayList<String>> data, String itemName,
ConsolFun consilidationFunction, Date timeBegin, Date timeEnd, long resolution) throws IOException {
RrdDb rrdDb = new RrdDb(RRD_FOLDER + File.separator + itemName + ".rrd");
FetchRequest fetchRequest = rrdDb.createFetchRequest(consilidationFunction, Util.getTimestamp(timeBegin),
Util.getTimestamp(timeEnd), resolution);
FetchData fetchData = fetchRequest.fetchData();
// logger.info(fetchData.toString());
long[] timestamps = fetchData.getTimestamps();
double[][] values = fetchData.getValues();
logger.debug("RRD fetch returned '{}' rows and '{}' columns", fetchData.getRowCount(),
fetchData.getColumnCount());
for (int row = 0; row < fetchData.getRowCount(); row++) {
// change to microseconds
long time = timestamps[row] * 1000;
if (!data.containsKey(time)) {
data.put(time, new ArrayList<String>());
}
ArrayList<String> vals = data.get(time);
int indexOffset = vals.size();
for (int dsIndex = 0; dsIndex < fetchData.getColumnCount(); dsIndex++) {
vals.add(dsIndex + indexOffset, formatDouble(values[dsIndex][row], "null", true));
}
}
rrdDb.close();
return data;
}
示例4: getAttributesHistory
import org.rrd4j.core.FetchData; //导入依赖的package包/类
@Override
public String getAttributesHistory(String objectName, String[] attrs, String range) throws IOException {
RrdDb db = new RrdDb(statBaseName, true);
long timeEnd = db.getLastUpdateTime();
// force float separator for JSON parsing
DecimalFormatSymbols otherSymbols = new DecimalFormatSymbols(Locale.US);
otherSymbols.setDecimalSeparator('.');
// formatting will greatly reduce response size
DecimalFormat formatter = new DecimalFormat("###.###", otherSymbols);
// construct the JSON response directly in a String
StringBuilder result = new StringBuilder();
result.append("{");
for (int i = 0; i < attrs.length; i++) {
String dataSource = RRDSigarDataStore.toDataStoreName(attrs[i] + "-" + objectName);
char zone = range.charAt(0);
long timeStart;
switch (zone) {
default:
case 'a': // 1 minute
timeStart = timeEnd - 60;
break;
case 'm': // 10 minute
timeStart = timeEnd - 60 * 10;
break;
case 'h': // 1 hours
timeStart = timeEnd - 60 * 60;
break;
case 'H': // 8 hours
timeStart = timeEnd - 60 * 60 * 8;
break;
case 'd': // 1 day
timeStart = timeEnd - 60 * 60 * 24;
break;
case 'w': // 1 week
timeStart = timeEnd - 60 * 60 * 24 * 7;
break;
case 'M': // 1 month
timeStart = timeEnd - 60 * 60 * 24 * 28;
break;
case 'y': // 1 year
timeStart = timeEnd - 60 * 60 * 24 * 365;
break;
}
FetchRequest req = db.createFetchRequest(ConsolFun.AVERAGE, timeStart, timeEnd);
req.setFilter(dataSource);
FetchData fetchData = req.fetchData();
result.append("\"").append(dataSource).append("\":[");
double[] values = fetchData.getValues(dataSource);
for (int j = 0; j < values.length - 1; j++) {
if (Double.compare(Double.NaN, values[j]) == 0) {
result.append("null");
} else {
result.append(formatter.format(values[j]));
}
if (j < values.length - 2)
result.append(',');
}
result.append(']');
if (i < attrs.length - 1)
result.append(',');
}
result.append("}");
db.close();
return result.toString();
}
示例5: testSpike
import org.rrd4j.core.FetchData; //导入依赖的package包/类
@Test
public void testSpike() throws IOException {
RrdDef rrdDef = new RrdDef("testSpike.rrd", 0, 60);
rrdDef.setVersion(2);
rrdDef.addDatasource("ds", GAUGE, 3600, -5, 30);
rrdDef.addArchive(AVERAGE, 0.5, 60, 999);
RrdDb rrdDb = new RrdDb(rrdDef,factory);
Calendar testTime = Calendar.getInstance();
testTime.set(Calendar.MINUTE, 0);
testTime.set(Calendar.SECOND, 0);
testTime.set(Calendar.MILLISECOND, 0);
System.out.println(testTime);
//testTime.add(Calendar.HOUR, -1);
long start = Util.getTimestamp(testTime);
long timeStamp = start;
for(int i = 0; i < 180; i++) {
long sampleTime = timeStamp;
if(i == 117) {
sampleTime += -1;
}
rrdDb.createSample(sampleTime).setValue("ds", 30).update();
timeStamp += 60;
}
long end = timeStamp;
FetchData f = rrdDb.createFetchRequest(AVERAGE, start, end).fetchData();
System.out.println(f.dump());
double[] values = f.getValues("ds");
assertTrue("Data before first entry", Double.isNaN(values[0]));
assertEquals("Bad average in point 1", 30, values[1], 1e-3);
assertEquals("Bad average in point 2", 30, values[2], 1e-3);
assertTrue("Data after last entry", Double.isNaN(values[3]));
rrdDb.close();
RrdDb rrdDbForRead = new RrdDb("testSpike.rrd",factory);
FetchData result = rrdDbForRead.createFetchRequest(AVERAGE, start, end).fetchData();
System.out.println(f.dump());
double[] resultData = result.getValues("ds");
assertTrue("Data before first entry", Double.isNaN(resultData[0]));
assertEquals("Bad average in point 1", 30, resultData[1], 1e-3);
assertEquals("Bad average in point 2", 30, resultData[2], 1e-3);
assertTrue("Data after last entry", Double.isNaN(resultData[3]));
rrdDbForRead.close();
}