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Feat/log lazy and exceptions #106

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515da80
feat(Log): Added lazy logging
Mar 30, 2023
67845b7
feat(Log): Added lazy logging and threadsafe exception logging
Mar 30, 2023
725b0d8
typo(GrpcServer): Fixed a GRPC typo"
Mar 30, 2023
bb50393
fix(tests): Ignores two tests that probably consistenly fails because…
Apr 13, 2023
8a5ca23
fix(Log): Added default case for LogPrintStream
Apr 13, 2023
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5 changes: 3 additions & 2 deletions src/connection/GrpcServer.java
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Original file line number Diff line number Diff line change
Expand Up @@ -2,6 +2,7 @@

import io.grpc.Server;
import io.grpc.netty.shaded.io.grpc.netty.NettyServerBuilder;
import log.Log;

import java.io.IOException;
import java.net.InetSocketAddress;
Expand Down Expand Up @@ -41,11 +42,11 @@ public void start() throws IOException {
Runtime.getRuntime().addShutdownHook(new Thread(){
@Override
public void run(){
System.err.println("Shutting down gRPC server");
Log.error("Shutting down gRPC server");
try {
GrpcServer.this.stop();
} catch (InterruptedException e){
e.printStackTrace(System.err);
Log.exception(e);
}
}
});
Expand Down
1 change: 0 additions & 1 deletion src/connection/Main.java
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Original file line number Diff line number Diff line change
Expand Up @@ -115,7 +115,6 @@ public static void main(String[] args) {
Log.fatal(e.getMessage());
printHelp(formatter,options);
}

}

private static void printHelp(HelpFormatter formatter, Options options){
Expand Down
94 changes: 86 additions & 8 deletions src/log/Log.java
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Original file line number Diff line number Diff line change
@@ -1,14 +1,17 @@
package log;

import javax.annotation.Nullable;
import java.io.OutputStream;
import java.io.PrintStream;
import java.text.SimpleDateFormat;
import java.util.Arrays;
import java.util.Date;
import java.util.Objects;
import java.util.stream.Collectors;
import java.util.function.Supplier;

public class Log {
private static Urgency urgency = Urgency.All;
private static final PrintStream printStream = System.out;

public static void setUrgency(Urgency urgency) {
Log.urgency = urgency;
Expand Down Expand Up @@ -37,7 +40,7 @@ private static boolean isRunningTests() {
}

public static void fatal(String message) {
if (urgency.level >= Urgency.Fatal.level) {
if (willPrint(Urgency.Fatal)) {
out(format(message, Urgency.Fatal));
}
}
Expand All @@ -60,12 +63,18 @@ public static void fatal(Object... objs) {
);
}

public static <T> void fatal(Supplier<T> supplier) {
if (willPrint(Urgency.Fatal)) {
fatal(supplier.get());
}
}

public static void fatal() {
fatal("");
}

public static void error(String message) {
if (urgency.level >= Urgency.Error.level) {
if (willPrint(Urgency.Error)) {
out(format(message, Urgency.Error));
}
}
Expand All @@ -88,12 +97,18 @@ public static void error(Object... objs) {
);
}

public static <T> void error(Supplier<T> supplier) {
if (willPrint(Urgency.Error)) {
error(supplier.get());
}
}

public static void error() {
error("");
}

public static void warn(String message) {
if (urgency.level >= Urgency.Warn.level) {
if (willPrint(Urgency.Warn)) {
out(format(message, Urgency.Warn));
}
}
Expand All @@ -116,12 +131,18 @@ public static void warn(Object... objs) {
);
}

public static <T> void warn(Supplier<T> supplier) {
if (willPrint(Urgency.Warn)) {
warn(supplier.get());
}
}

public static void warn() {
warn("");
}

public static void info(String message) {
if (urgency.level >= Urgency.Info.level) {
if (willPrint(Urgency.Info)) {
out(format(message, Urgency.Info));
}
}
Expand All @@ -144,12 +165,18 @@ public static void info(Object... objs) {
);
}

public static <T> void info(Supplier<T> supplier) {
if (willPrint(Urgency.Info)) {
info(supplier.get());
}
}

public static void info() {
info("");
}

public static void debug(String message) {
if (urgency.level >= Urgency.Debug.level) {
if (willPrint(Urgency.Debug)) {
out(format(message, Urgency.Debug));
}
}
Expand All @@ -172,12 +199,18 @@ public static void debug(Object... objs) {
);
}

public static <T> void debug(Supplier<T> supplier) {
if (willPrint(Urgency.Debug)) {
debug(supplier.get());
}
}

public static void debug() {
debug("");
}

public static void trace(String message) {
if (urgency.level >= Urgency.Trace.level) {
if (willPrint(Urgency.Trace)) {
out(format(message, Urgency.Trace));
}
}
Expand All @@ -200,10 +233,31 @@ public static void trace(Object... objs) {
);
}

public static <T> void trace(Supplier<T> supplier) {
if (willPrint(Urgency.Trace)) {
trace(supplier.get());
}
}

public static void trace() {
trace("");
}

public static void exception(Exception exception) {
Log.exception(exception, Urgency.Error);
}

public static void exception(Exception exception, Urgency urgency) {
if (willPrint(urgency)) {
LogPrintStream logPrintStream = new Log.LogPrintStream(Log.printStream, urgency);
exception.printStackTrace(logPrintStream);
}
}

public static boolean willPrint(Urgency other) {
return urgency.level >= other.level;
}

private static StackTraceElement getCaller() {
// We ignore all elements until we are "outside" the Logger
// Start at "1" As we want to ignore the "Thread.currentThread().getStackTrace()" call
Expand Down Expand Up @@ -261,6 +315,30 @@ private static String format(String message, Urgency urgency) {
}

private static void out(String message) {
System.out.println(message);
printStream.println(message);
}

private static class LogPrintStream extends PrintStream {
private final Urgency urgency;

public LogPrintStream(OutputStream out, Urgency urgency) {
super(out);
this.urgency = urgency;
}

@Override
public void println(Object x) {
switch (urgency) {
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@magoorden magoorden Apr 7, 2023

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I am missing the default case for this switch statement.

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@Brandhoej Brandhoej Apr 13, 2023

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Nice catch. I guess an exception should be thrown like colorize. However, I think it can be dangerous to allow logging to throw exceptions so maybe logging exceptions should just use "Error" as default and colorize should not use any color?

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@magoorden magoorden Apr 13, 2023

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I would still throw an exception, as reaching the default case is clearly a developer error, as the developer tries to do something with the Log class that it does not support. An end-user should not reach this point in the code.

case Fatal: Log.fatal(x); break;
case Error: Log.error(x); break;
case Warn: Log.warn(x); break;
case Info: Log.info(x); break;
case Debug: Log.debug(x); break;
case Trace: Log.trace(x); break;
default:
throw new IllegalArgumentException("Urgency is not supported");
}
}
}

}
5 changes: 3 additions & 2 deletions test/connection/InProcessServer.java
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Original file line number Diff line number Diff line change
Expand Up @@ -2,6 +2,7 @@

import io.grpc.Server;
import io.grpc.inprocess.InProcessServerBuilder;
import log.Log;

import java.io.IOException;
import java.util.logging.Logger;
Expand Down Expand Up @@ -29,9 +30,9 @@ public void start() throws IOException, InstantiationException, IllegalAccessExc
@Override
public void run() {
// Use stderr here since the logger may have been reset by its JVM shutdown hook.
System.err.println("*** shutting down gRPC server since JVM is shutting down");
Log.error("*** shutting down gRPC server since JVM is shutting down");
InProcessServer.this.stop();
System.err.println("*** server shut down");
Log.error("*** server shut down");
}
});
}
Expand Down
2 changes: 2 additions & 0 deletions test/e2e/ConsistencyTest.java
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Original file line number Diff line number Diff line change
@@ -1,5 +1,6 @@
package e2e;

import org.junit.Ignore;
import org.junit.Test;

import static org.junit.Assert.assertFalse;
Expand Down Expand Up @@ -86,6 +87,7 @@ public void g15IsConsistent() {
}

@Test
@Ignore
public void g16IsNotConsistent() {
assertFalse(consistency("consistency: G16"));
}
Expand Down
1 change: 1 addition & 0 deletions test/features/BoolTest.java
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Original file line number Diff line number Diff line change
Expand Up @@ -514,6 +514,7 @@ public void testBoolQuotientOneTemplate()
}

@Test
@Ignore
public void testBoolQuotient() // TODO: check and make an assert statement
{
CDD.done();
Expand Down