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// Copyright Vespa.ai. Licensed under the terms of the Apache 2.0 license. See LICENSE in the project root.
package com.yahoo.jdisc.core;
import com.yahoo.net.HostName;
import org.osgi.service.log.LogEntry;
import org.osgi.service.log.LogLevel;
import org.osgi.service.log.LogListener;
import java.io.PrintStream;
import java.util.Optional;
/**
* @author Vikas Panwar
*/
class ConsoleLogListener implements LogListener {
public static final LogLevel DEFAULT_LOG_LEVEL = LogLevel.TRACE;
private final ConsoleLogFormatter formatter;
private final PrintStream out;
private final LogLevel maxLevel;
ConsoleLogListener(PrintStream out, String serviceName, String logLevel) {
this.out = out;
this.formatter = new ConsoleLogFormatter(getHostname(), getProcessId(), serviceName);
this.maxLevel = parseLogLevel(logLevel).orElse(null);
}
@Override
public void logged(LogEntry entry) {
if (maxLevel == null || !maxLevel.implies(entry.getLogLevel())) {
return;
}
out.println(formatter.formatEntry(entry));
}
public static Optional<LogLevel> parseLogLevel(String logLevel) {
if (logLevel == null || logLevel.isEmpty()) {
return Optional.of(DEFAULT_LOG_LEVEL);
}
if (logLevel.equalsIgnoreCase("OFF")) {
return Optional.empty();
}
if (logLevel.equalsIgnoreCase("ERROR")) {
return Optional.of(LogLevel.ERROR);
}
if (logLevel.equalsIgnoreCase("WARNING")) {
return Optional.of(LogLevel.WARN);
}
if (logLevel.equalsIgnoreCase("INFO")) {
return Optional.of(LogLevel.INFO);
}
if (logLevel.equalsIgnoreCase("DEBUG")) {
return Optional.of(LogLevel.DEBUG);
}
if (logLevel.equalsIgnoreCase("ALL")) {
return Optional.of(LogLevel.TRACE);
}
try {
return Optional.of(LogLevel.values()[Integer.parseInt(logLevel)]);
} catch (NumberFormatException | IndexOutOfBoundsException e) {
// fall through
}
return Optional.of(DEFAULT_LOG_LEVEL);
}
public static ConsoleLogListener newInstance() {
return new ConsoleLogListener(System.out,
System.getProperty("jdisc.logger.tag"),
System.getProperty("jdisc.logger.level"));
}
static String getProcessId() {
return Long.toString(ProcessHandle.current().pid());
}
static String getHostname() {
return HostName.getLocalhost();
}
}
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