public ProcessRuntimeMetrics getRuntimeMetrics(final List<ProcessIdentifier> identifiers) {
final ProcessRuntimeMetrics totalMetrics = new ProcessRuntimeMetrics();
long sumOfRuntimes = 0;
long sumOfInstances = 0;
for (final ProcessIdentifier identifier : identifiers) {
final ProcessRuntimeMetrics procMetrics = getRuntimeMetrics(identifier);
sumOfRuntimes += procMetrics.getMeanRuntime() * procMetrics.getNumberOfInstances();
sumOfInstances += procMetrics.getNumberOfInstances();
if ((totalMetrics.getMinRuntime() == 0)
|| (totalMetrics.getMinRuntime() > procMetrics.getMinRuntime())) {
totalMetrics.setMinRuntime(procMetrics.getMinRuntime());
}
if ((totalMetrics.getMaxRuntime() == 0)
|| (totalMetrics.getMaxRuntime() < procMetrics.getMaxRuntime())) {
totalMetrics.setMaxRuntime(procMetrics.getMaxRuntime());
}
}
totalMetrics.setNumberOfInstances(sumOfInstances);
if (sumOfInstances != 0) {
totalMetrics.setMeanRuntime(sumOfRuntimes / sumOfInstances);
} else {
totalMetrics.setMeanRuntime(0);
}
return totalMetrics;
}
