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BenchmarkUtils.java
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84 lines (73 loc) · 2.73 KB
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package benchmark;
import java.io.BufferedReader;
import java.io.IOException;
import java.io.InputStream;
import java.io.InputStreamReader;
import java.net.URL;
import java.nio.charset.Charset;
import java.time.LocalDateTime;
import java.time.format.DateTimeFormatter;
import java.util.concurrent.Callable;
public class BenchmarkUtils {
@SuppressWarnings("UnstableApiUsage")
static String loadResource(String name) {
return asRTE(() -> {
URL resource = BenchmarkUtils.class.getClassLoader().getResource(name);
if (resource == null) {
throw new IllegalArgumentException("missing resource: " + name);
}
byte[] bytes;
try (InputStream inputStream = resource.openStream()) {
bytes = inputStream.readAllBytes();
}
return new String(bytes, Charset.defaultCharset());
});
}
static <T> T asRTE(Callable<T> callable) {
try {
return callable.call();
} catch (Exception e) {
throw new RuntimeException(e);
}
}
public static void runInToolingForSomeTimeThenExit(Runnable setup, Runnable r, Runnable tearDown) {
int runForMillis = getRunForMillis();
if (runForMillis <= 0) {
System.out.print("'runForMillis' environment var is not set - continuing \n");
return;
}
System.out.printf("Running initial code in some tooling - runForMillis=%d \n", runForMillis);
System.out.print("Get your tooling in order and press enter...");
readLine();
System.out.print("Lets go...\n");
setup.run();
DateTimeFormatter dtf = DateTimeFormatter.ofPattern("HH:mm:ss");
long now, then = System.currentTimeMillis();
do {
now = System.currentTimeMillis();
long msLeft = runForMillis - (now - then);
System.out.printf("\t%s Running in loop... %s ms left\n", dtf.format(LocalDateTime.now()), msLeft);
r.run();
now = System.currentTimeMillis();
} while ((now - then) < runForMillis);
tearDown.run();
System.out.printf("This ran for %d millis. Exiting...\n", System.currentTimeMillis() - then);
System.exit(0);
}
private static void readLine() {
BufferedReader br = new BufferedReader(new InputStreamReader(System.in));
try {
br.readLine();
} catch (IOException e) {
throw new RuntimeException(e);
}
}
private static int getRunForMillis() {
String runFor = System.getenv("runForMillis");
try {
return Integer.parseInt(runFor);
} catch (NumberFormatException e) {
return -1;
}
}
}