package org.infinispan.factories.threads;
import java.util.regex.Matcher;
import java.util.regex.Pattern;
/**
* @author Galder Zamarreño
*/
public class ThreadNameInfo {
private final long globalThreadSequenceNum;
private final long perFactoryThreadSequenceNum;
private final long factorySequenceNum;
private final String node;
private final String component;
ThreadNameInfo(long globalThreadSequenceNum, long perFactoryThreadSequenceNum,
long factorySequenceNum, String node, String component) {
this.globalThreadSequenceNum = globalThreadSequenceNum;
this.perFactoryThreadSequenceNum = perFactoryThreadSequenceNum;
this.factorySequenceNum = factorySequenceNum;
this.node = node;
this.component = component;
}
private static final Pattern searchPattern = Pattern.compile("([^%]+)|%.");
/**
* Format the thread name string.
* <ul>
* <li>{@code %%} - emit a percent sign</li>
* <li>{@code %t} - emit the per-factory thread sequence number</li>
* <li>{@code %g} - emit the global thread sequence number</li>
* <li>{@code %f} - emit the factory sequence number</li>
* <li>{@code %p} - emit the {@code ":"}-separated thread group path</li>
* <li>{@code %i} - emit the thread ID</li>
* <li>{@code %G} - emit the thread group name</li>
* <li>{@code %n} - emit the node name</li>
* <li>{@code %c} - emit the component name</li>
* </ul>
*
* @param thread the thread
* @param formatString the format string
* @return the thread name string
*/
public String format(Thread thread, String formatString) {
final StringBuilder builder = new StringBuilder(formatString.length() * 5);
final ThreadGroup group = thread.getThreadGroup();
final Matcher matcher = searchPattern.matcher(formatString);
while (matcher.find()) {
if (matcher.group(1) != null) {
builder.append(matcher.group());
} else {
switch (matcher.group().charAt(1)) {
case '%': builder.append('%'); break;
case 't': builder.append(perFactoryThreadSequenceNum); break;
case 'g': builder.append(globalThreadSequenceNum); break;
case 'f': builder.append(factorySequenceNum); break;
case 'p': if (group != null) appendGroupPath(group, builder); break;
case 'i': builder.append(thread.getId()); break;
case 'G': if (group != null) builder.append(group.getName()); break;
case 'n': if (node != null) builder.append(node); break;
case 'c': if (component != null) builder.append(component); break;
}
}
}
return builder.toString();
}
private static void appendGroupPath(ThreadGroup group, StringBuilder builder) {
final ThreadGroup parent = group.getParent();
if (parent != null) {
appendGroupPath(parent, builder);
builder.append(':');
}
builder.append(group.getName());
}
}