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// Copyright Yahoo. Licensed under the terms of the Apache 2.0 license. See LICENSE in the project root.
package com.yahoo.log;
import com.yahoo.text.Utf8;
import java.nio.MappedByteBuffer;
import java.util.HashMap;
import java.util.Map;
/**
* Contains a repository of mapped log level controllers.
*
* @author Ulf Lilleengen
* @since 5.1
* Should only be used internally in the log library
*/
class MappedLevelControllerRepo {
private final Map<String, LevelController> levelControllerMap = new HashMap<>();
private final MappedByteBuffer mapBuf;
private final int controlFileHeaderLength;
private final int numLevels;
private final String logControlFilename;
MappedLevelControllerRepo(MappedByteBuffer mapBuf, int controlFileHeaderLength, int numLevels, String logControlFilename) {
this.mapBuf = mapBuf;
this.controlFileHeaderLength = controlFileHeaderLength;
this.numLevels = numLevels;
this.logControlFilename = logControlFilename;
buildMap();
}
private void buildMap() {
int len = mapBuf.capacity();
int startOfLine = controlFileHeaderLength;
int numLine = 1;
int i = 0;
while (i < len) {
if (mapBuf.get(i) == '\n') {
startOfLine = ++i;
++numLine;
} else if (i < controlFileHeaderLength) {
++i;
} else if (mapBuf.get(i) == ':') {
int endOfName = i;
int levels = i;
levels += 2;
while ((levels % 4) != 0) {
levels++;
}
int endLine = levels + 4*numLevels;
if (checkLine(startOfLine, endOfName, levels, endLine)) {
int l = endOfName - startOfLine;
if (l > 1 && mapBuf.get(startOfLine) == '.') {
++startOfLine;
--l;
}
byte[] namebytes = new byte[l];
for (int j = 0; j < l; j++) {
namebytes[j] = mapBuf.get(startOfLine + j);
}
String name = Utf8.toString(namebytes);
if (name.equals("default")) {
name = "";
}
MappedLevelController ctrl = new MappedLevelController(mapBuf, levels, name);
levelControllerMap.put(name, ctrl);
i = endLine;
continue; // good line
}
// bad line, skip
while (i < len && mapBuf.get(i) != '\n') {
i++;
}
int bll = i - startOfLine;
byte[] badline = new byte[bll];
for (int j = 0; j < bll; j++) {
badline[j] = mapBuf.get(startOfLine + j);
}
System.err.println("bad loglevel line "+numLine+" in "
+ logControlFilename + ": " + Utf8.toString(badline));
} else {
i++;
}
}
}
private boolean checkLine(int sol, int endnam, int levstart, int eol) {
if (eol >= mapBuf.capacity()) {
System.err.println("line would end after end of file");
return false;
}
if (mapBuf.get(eol) != '\n') {
System.err.println("line must end with newline, was: "+mapBuf.get(eol));
return false;
}
if (endnam < sol + 1) {
System.err.println("name must be at least one character after start of line");
return false;
}
return MappedLevelController.checkOnOff(mapBuf, levstart);
}
LevelController getLevelController(String suffix) {
return levelControllerMap.get(suffix);
}
void checkBack() {
for (LevelController ctrl : levelControllerMap.values()) {
ctrl.checkBack();
}
}
}
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