Source Code Cross Referenced for NetLogWriter.java in  » Database-DBMS » db-derby-10.2 » org » apache » derby » client » net » Java Source Code / Java DocumentationJava Source Code and Java Documentation

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Java Source Code / Java Documentation » Database DBMS » db derby 10.2 » org.apache.derby.client.net 
Source Cross Referenced  Class Diagram Java Document (Java Doc) 


001:        /*
002:
003:           Derby - Class org.apache.derby.client.net.NetLogWriter
004:
005:           Licensed to the Apache Software Foundation (ASF) under one or more
006:           contributor license agreements.  See the NOTICE file distributed with
007:           this work for additional information regarding copyright ownership.
008:           The ASF licenses this file to You under the Apache License, Version 2.0
009:           (the "License"); you may not use this file except in compliance with
010:           the License.  You may obtain a copy of the License at
011:
012:              http://www.apache.org/licenses/LICENSE-2.0
013:
014:           Unless required by applicable law or agreed to in writing, software
015:           distributed under the License is distributed on an "AS IS" BASIS,
016:           WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
017:           See the License for the specific language governing permissions and
018:           limitations under the License.
019:
020:         */
021:
022:        package org.apache.derby.client.net;
023:
024:        // network traffic tracer.
025:        // This class traces communication buffers for both sends and receives.
026:        // The value of the hex bytes are traced along with the ascii and ebcdic translations.
027:
028:        public class NetLogWriter extends org.apache.derby.client.am.LogWriter {
029:
030:            // The recevie constant is used to indicate that the bytes were read to a Stream.
031:            // It indicates to this class that a receive header should be used.
032:            public static final int TYPE_TRACE_RECEIVE = 2;
033:
034:            // The send constant is used to indicate that the bytes were written to
035:            // a Stream.  It indicates to this class that a send header should be used.
036:            public static final int TYPE_TRACE_SEND = 1;
037:
038:            //------------------------------ internal constants --------------------------
039:
040:            // This class was implemented using character arrays to translate bytes
041:            // into ascii and ebcdic.  The goal was to be able to quickly index into the
042:            // arrays to find the characters.  Char arrays instead of strings were used as
043:            // much as possible in an attempt to help speed up performance.
044:
045:            // An array of characters used to translate bytes to ascii.
046:            // The position in the array corresponds to the hex value of the character.
047:            private static final char asciiChar__[] = {
048:                    // 0   1   2   3   4   5   6   7   8   9   A   B   C   D   E   F
049:                    '.',
050:                    '.',
051:                    '.',
052:                    '.',
053:                    '.',
054:                    '.',
055:                    '.',
056:                    '.',
057:                    '.',
058:                    '.',
059:                    '.',
060:                    '.',
061:                    '.',
062:                    '.',
063:                    '.',
064:                    '.', //0
065:                    '.',
066:                    '.',
067:                    '.',
068:                    '.',
069:                    '.',
070:                    '.',
071:                    '.',
072:                    '.',
073:                    '.',
074:                    '.',
075:                    '.',
076:                    '.',
077:                    '.',
078:                    '.',
079:                    '.',
080:                    '.', //1
081:                    ' ', '!',
082:                    '"',
083:                    '#',
084:                    '$',
085:                    '%',
086:                    '&',
087:                    '\'',
088:                    '(',
089:                    ')',
090:                    '*',
091:                    '+',
092:                    ',',
093:                    '-',
094:                    '.',
095:                    '/', //2
096:                    '0', '1', '2',
097:                    '3',
098:                    '4',
099:                    '5',
100:                    '6',
101:                    '7',
102:                    '8',
103:                    '9',
104:                    ':',
105:                    ';',
106:                    '<',
107:                    '=',
108:                    '>',
109:                    '?', //3
110:                    '@', 'A', 'B', 'C',
111:                    'D',
112:                    'E',
113:                    'F',
114:                    'G',
115:                    'H',
116:                    'I',
117:                    'J',
118:                    'K',
119:                    'L',
120:                    'M',
121:                    'N',
122:                    'O', //4
123:                    'P', 'Q', 'R', 'S', 'T',
124:                    'U',
125:                    'V',
126:                    'W',
127:                    'X',
128:                    'Y',
129:                    'Z',
130:                    '[',
131:                    '\\',
132:                    ']',
133:                    '^',
134:                    '_', //5
135:                    '`', 'a', 'b', 'c', 'd', 'e',
136:                    'f',
137:                    'g',
138:                    'h',
139:                    'i',
140:                    'j',
141:                    'k',
142:                    'l',
143:                    'm',
144:                    'n',
145:                    'o', //6
146:                    'p', 'q', 'r', 's', 't', 'u', 'v',
147:                    'w',
148:                    'x',
149:                    'y',
150:                    'z',
151:                    '{',
152:                    '|',
153:                    '}',
154:                    '~',
155:                    '.', //7
156:                    '.', '.', '.', '.', '.', '.', '.', '.',
157:                    '.',
158:                    '.',
159:                    '.',
160:                    '.',
161:                    '.',
162:                    '.',
163:                    '.',
164:                    '.', //8
165:                    '.', '.', '.', '.', '.', '.', '.', '.', '.',
166:                    '.',
167:                    '.',
168:                    '.',
169:                    '.',
170:                    '.',
171:                    '.',
172:                    '.', //9
173:                    '.', '.', '.', '.', '.', '.', '.', '.', '.', '.',
174:                    '.',
175:                    '.',
176:                    '.',
177:                    '.',
178:                    '.',
179:                    '.', //A
180:                    '.', '.', '.', '.', '.', '.', '.', '.', '.', '.', '.',
181:                    '.',
182:                    '.',
183:                    '.',
184:                    '.',
185:                    '.', //B
186:                    '.', '.', '.', '.', '.', '.', '.', '.', '.', '.', '.', '.',
187:                    '.',
188:                    '.',
189:                    '.',
190:                    '.', //C
191:                    '.', '.', '.', '.', '.', '.', '.', '.', '.', '.', '.', '.',
192:                    '.', '.',
193:                    '.',
194:                    '.', //D
195:                    '.', '.', '.', '.', '.', '.', '.', '.', '.', '.', '.', '.',
196:                    '.', '.', '.',
197:                    '.', //E
198:                    '.', '.', '.', '.', '.', '.', '.', '.', '.', '.', '.', '.',
199:                    '.', '.', '.', '.' //F
200:            };
201:
202:            // This column position header is used to mark offsets into the trace.
203:            private static final String colPosHeader__ = "       0 1 2 3 4 5 6 7   8 9 A B C D E F   0123456789ABCDEF  0123456789ABCDEF";
204:
205:            // An array of characters used to translate bytes to ebcdic.
206:            // The position in the array corresponds to the hex value of the
207:            // character.
208:            private static final char ebcdicChar__[] = {
209:                    // 0   1   2   3   4   5   6   7   8   9   A   B   C   D   E   F
210:                    '.',
211:                    '.',
212:                    '.',
213:                    '.',
214:                    '.',
215:                    '.',
216:                    '.',
217:                    '.',
218:                    '.',
219:                    '.',
220:                    '.',
221:                    '.',
222:                    '.',
223:                    '.',
224:                    '.',
225:                    '.', //0
226:                    '.',
227:                    '.',
228:                    '.',
229:                    '.',
230:                    '.',
231:                    '.',
232:                    '.',
233:                    '.',
234:                    '.',
235:                    '.',
236:                    '.',
237:                    '.',
238:                    '.',
239:                    '.',
240:                    '.',
241:                    '.', //1
242:                    '.', '.',
243:                    '.',
244:                    '.',
245:                    '.',
246:                    '.',
247:                    '.',
248:                    '.',
249:                    '.',
250:                    '.',
251:                    '.',
252:                    '.',
253:                    '.',
254:                    '.',
255:                    '.',
256:                    '.', //2
257:                    '.', '.', '.',
258:                    '.',
259:                    '.',
260:                    '.',
261:                    '.',
262:                    '.',
263:                    '.',
264:                    '.',
265:                    '.',
266:                    '.',
267:                    '.',
268:                    '.',
269:                    '.',
270:                    '.', //3
271:                    ' ', '.', '.', '.',
272:                    '.',
273:                    '.',
274:                    '.',
275:                    '.',
276:                    '.',
277:                    '.',
278:                    '.',
279:                    '.',
280:                    '<',
281:                    '(',
282:                    '+',
283:                    '|', //4
284:                    '&', '.', '.', '.', '.',
285:                    '.',
286:                    '.',
287:                    '.',
288:                    '.',
289:                    '.',
290:                    '!',
291:                    '$',
292:                    '*',
293:                    ')',
294:                    ';',
295:                    '.', //5
296:                    '-', '/', '.', '.', '.', '.',
297:                    '.',
298:                    '.',
299:                    '.',
300:                    '.',
301:                    '|',
302:                    ',',
303:                    '%',
304:                    '_',
305:                    '>',
306:                    '?', //6
307:                    '.', '.', '.', '.', '.', '.', '.',
308:                    '.',
309:                    '.',
310:                    '`',
311:                    ':',
312:                    '#',
313:                    '@',
314:                    '\'',
315:                    '=',
316:                    '"', //7
317:                    '.', 'a', 'b', 'c', 'd', 'e', 'f', 'g',
318:                    'h',
319:                    'i',
320:                    '.',
321:                    '.',
322:                    '.',
323:                    '.',
324:                    '.',
325:                    '.', //8
326:                    '.', 'j', 'k', 'l', 'm', 'n', 'o', 'p', 'q',
327:                    'r',
328:                    '.',
329:                    '.',
330:                    '.',
331:                    '.',
332:                    '.',
333:                    '.', //9
334:                    '.', '~', 's', 't', 'u', 'v', 'w', 'x', 'y', 'z',
335:                    '.',
336:                    '.',
337:                    '.',
338:                    '.',
339:                    '.',
340:                    '.', //A
341:                    '.', '.', '.', '.', '.', '.', '.', '.', '.', '.', '.',
342:                    '.',
343:                    '.',
344:                    '.',
345:                    '.',
346:                    '.', //B
347:                    '{', 'A', 'B', 'C', 'D', 'E', 'F', 'G', 'H', 'I', '.', '.',
348:                    '.',
349:                    '.',
350:                    '.',
351:                    '.', //C
352:                    '}', 'J', 'K', 'L', 'M', 'N', 'O', 'P', 'Q', 'R', '.', '.',
353:                    '.', '.',
354:                    '.',
355:                    '.', //D
356:                    '\\', '.', 'S', 'T', 'U', 'V', 'W', 'X', 'Y', 'Z', '.',
357:                    '.', '.', '.', '.',
358:                    '.', //E
359:                    '0', '1', '2', '3', '4', '5', '6', '7', '8', '9', '.', '.',
360:                    '.', '.', '.', '.' //F
361:            };
362:
363:            // An array of characters representing hex numbers.
364:            private static final char hexDigit__[] = { '0', '1', '2', '3', '4',
365:                    '5', '6', '7', '8', '9', 'A', 'B', 'C', 'D', 'E', 'F' };
366:
367:            // The receive header comes befor bytes which would be read from a stream.
368:            private static final String receiveHeader__ = "       RECEIVE BUFFER:                     (ASCII)           (EBCDIC)";
369:
370:            // The send header comes before bytes which would be written to a stream.
371:            private static final String sendHeader__ = "       SEND BUFFER:                        (ASCII)           (EBCDIC)";
372:
373:            private static final char spaceChar__ = ' ';
374:
375:            private static final char zeroChar__ = '0';
376:
377:            // This mapping table associates a codepoint to a String describing the codepoint.
378:            // This is needed because the trace prints the first codepoint in send and receive buffers.
379:            // This is created lazily because there is no need to create the mapping if tracing isn't used.
380:            // So this array will only be created when the com buffer trace is started.
381:            private static CodePointNameTable codePointNameTable__ = null;
382:
383:            //-----------------------------internal state---------------------------------
384:
385:            //-----------------------------constructors/finalizer-------------------------
386:
387:            // One NetLogWriter object is created per data source, iff tracing is enabled.
388:            public NetLogWriter(java.io.PrintWriter printWriter, int traceLevel) {
389:                super (printWriter, traceLevel);
390:
391:                // Initialize the codepoint name table if not previously initialized.
392:                // This is done lazily so that it is not created if the trace isn't used (save some init time).
393:                if (codePointNameTable__ == null) {
394:                    codePointNameTable__ = new CodePointNameTable();
395:                }
396:            }
397:
398:            //------------------------------entry points----------------------------------
399:
400:            // Specialization of LogWriter.traceConnectsExit()
401:            public void traceConnectsExit(
402:                    org.apache.derby.client.am.Connection connection) {
403:                if (traceSuspended()) {
404:                    return;
405:                }
406:                NetConnection c = (NetConnection) connection;
407:                synchronized (printWriter_) {
408:                    super .traceConnectsExit(c);
409:                    dncnetprint("  PROTOCOL manager levels: { ");
410:                    printWriter_.print("SQLAM=" + c.getSQLAM() + ", ");
411:                    printWriter_.print("AGENT=" + c.getAGENT() + ", ");
412:                    printWriter_.print("CMNTCPIP=" + c.getCMNTCPIP() + ", ");
413:                    printWriter_.print("RDB=" + c.getRDB() + ", ");
414:                    printWriter_.print("SECMGR=" + c.getSECMGR() + ", ");
415:                    printWriter_.print("XAMGR=" + c.getXAMGR() + ", ");
416:                    printWriter_.print("SYNCPTMGR=" + c.getSYNCPTMGR() + ", ");
417:                    printWriter_.print("RSYNCMGR=" + c.getRSYNCMGR());
418:                    printWriter_.println(" }");
419:                    printWriter_.flush();
420:                }
421:            }
422:
423:            public void traceConnectsResetExit(
424:                    org.apache.derby.client.am.Connection connection) {
425:                if (traceSuspended()) {
426:                    return;
427:                }
428:                NetConnection c = (NetConnection) connection;
429:                synchronized (printWriter_) {
430:                    super .traceConnectsResetExit(c);
431:                    dncnetprint("  PROTOCOL manager levels: { ");
432:                    printWriter_.print("SQLAM=" + c.getSQLAM() + ", ");
433:                    printWriter_.print("AGENT=" + c.getAGENT() + ", ");
434:                    printWriter_.print("CMNTCPIP=" + c.getCMNTCPIP() + ", ");
435:                    printWriter_.print("RDB=" + c.getRDB() + ", ");
436:                    printWriter_.print("SECMGR=" + c.getSECMGR() + ", ");
437:                    printWriter_.print("XAMGR=" + c.getXAMGR() + ", ");
438:                    printWriter_.print("SYNCPTMGR=" + c.getSYNCPTMGR() + ", ");
439:                    printWriter_.print("RSYNCMGR=" + c.getRSYNCMGR());
440:                    printWriter_.println(" }");
441:                    printWriter_.flush();
442:                }
443:            }
444:
445:            // Pass the connection handle and print it in the header
446:            // What exactly is supposed to be passed,  assume one complete DSS packet
447:            // Write the communication buffer data to the trace.
448:            // The data is passed in via a byte array.  The start and length of the data is given.
449:            // The type is needed to indicate if the data is part of the send or receive buffer.
450:            // The class name, method name, and trcPt number are also written to the trace.
451:            // Not much checking is performed on the parameters.  This is done to help performance.
452:            synchronized public void traceProtocolFlow(byte[] buff, int offset,
453:                    int len, int type, String className, String methodName,
454:                    int tracepoint) {
455:                if (traceSuspended()) {
456:                    return;
457:                }
458:                if (!loggingEnabled(org.apache.derby.jdbc.ClientDataSource.TRACE_PROTOCOL_FLOWS)) {
459:                    return;
460:                }
461:                synchronized (printWriter_) {
462:                    super 
463:                            .tracepoint("[net]", tracepoint, className,
464:                                    methodName);
465:
466:                    int fullLen = len;
467:                    boolean printColPos = true;
468:                    while (fullLen >= 2) { // format each DssHdr seperately
469:                        // get the length of this DssHdr
470:                        len = ((buff[offset] & 0xff) << 8)
471:                                + ((buff[offset + 1] & 0xff) << 0);
472:
473:                        // check for valid dss header or not all of dss block
474:                        if ((len < 10) || (len > fullLen)) {
475:                            len = fullLen;
476:                        }
477:
478:                        // subtract that length from the full length
479:                        fullLen -= len;
480:                        // The data will only be written if there is a non-zero positive length.
481:                        if (len != 0) {
482:                            String codePointName = null;
483:                            // If the length <= 10, lookup the first codepoint so it's name can be printed
484:                            if (len >= 10) {
485:                                // Get the int value of the two byte unsigned codepoint.
486:                                int codePoint = getCodePoint(buff, offset + 8);
487:                                codePointName = codePointNameTable__
488:                                        .lookup(codePoint);
489:
490:                                // if this is not a valid codepoint then format the entire buffer
491:                                // as one block.
492:                                if (codePointName == null) {
493:                                    len += fullLen;
494:                                    fullLen = 0;
495:                                }
496:                            }
497:
498:                            if (!printColPos) { // not 1st Dss header of this buffer, write seperator
499:                                dncnetprintln("");
500:                            }
501:
502:                            if (codePointName == null) {
503:                                // codePointName was still null so either < 10 bytes were given or
504:                                // the codepoint wasn't found in the table.  Just print the plain send header.
505:                                dncnetprintln(getHeader(type));
506:                            } else {
507:                                // codePointName isn't null so the name of the codepoint will be printed.
508:                                printHeaderWithCodePointName(codePointName,
509:                                        type);
510:                            }
511:
512:                            // Print the col position header in the trace.
513:                            if (printColPos) { // first Dss header of buffer, need column position header
514:                                dncnetprintln(colPosHeader__);
515:                                printColPos = false;
516:                            }
517:
518:                            // A char array will be used to translate the bytes to their character
519:                            // representations along with ascii and ebcdic representations.
520:                            char trcDump[] = new char[77];
521:
522:                            // bCounter, aCounter, eCounter are offsets used to help position the characters
523:                            short bCounter = 7;
524:                            short aCounter = 43;
525:                            short eCounter = 61;
526:
527:                            // The lines will be counted starting at zero.
528:                            // This is hard coded since we are at the beginning.
529:                            trcDump[0] = zeroChar__;
530:                            trcDump[1] = zeroChar__;
531:                            trcDump[2] = zeroChar__;
532:                            trcDump[3] = zeroChar__;
533:
534:                            // The 0's are already in the trace so bump the line counter up a row.
535:                            int lineCounter = 0x10;
536:
537:                            // Make sure the character array has all blanks in it.
538:                            // Some of these blanks will be replaced later with values.
539:                            // The 0's were not wrote over.
540:                            for (int j = 4; j < 77; j++) {
541:                                trcDump[j] = spaceChar__;
542:                            }
543:
544:                            // i will maintain the position in the byte array to be traced.
545:                            int i = 0;
546:
547:                            do {
548:                                // Get the unsigned value of the byte.
549:                                //                  int num = b[off++] & 0xff;
550:                                int num = (buff[offset] < 0) ? buff[offset] + 256
551:                                        : buff[offset];
552:                                offset++;
553:                                i++;
554:                                // Place the characters representing the bytes in the array.
555:                                trcDump[bCounter++] = hexDigit__[((num >>> 4) & 0xf)];
556:                                trcDump[bCounter++] = hexDigit__[(num & 0xf)];
557:
558:                                // Place the ascii and ebcdc representations in the array.
559:                                trcDump[aCounter++] = asciiChar__[num];
560:                                trcDump[eCounter++] = ebcdicChar__[num];
561:
562:                                if (((i % 8) == 0)) {
563:                                    if (((i % 16) == 0)) {
564:                                        // Print the array each time 16 bytes are processed.
565:                                        dncnetprintln(trcDump);
566:                                        if (i != len) {
567:                                            // Not yet at the end of the byte array.
568:                                            if ((len - i) < 16) {
569:                                                // This is the last line so blank it all out.
570:                                                // This keeps the last line looking pretty in case
571:                                                // < 16 bytes remain.
572:                                                for (int j = 0; j < trcDump.length; j++) {
573:                                                    trcDump[j] = spaceChar__;
574:                                                }
575:                                            }
576:                                            // Reset the counters.
577:                                            bCounter = 0;
578:                                            aCounter = 43;
579:                                            eCounter = 61;
580:                                            // Reset the lineCounter if it starts to get too large.
581:                                            if (lineCounter == 0x100000) {
582:                                                lineCounter = 0;
583:                                            }
584:                                            // Place the characters representing the line counter in the array.
585:                                            trcDump[bCounter++] = hexDigit__[((lineCounter >>> 12) & 0xf)];
586:                                            trcDump[bCounter++] = hexDigit__[((lineCounter >>> 8) & 0xf)];
587:                                            trcDump[bCounter++] = hexDigit__[((lineCounter >>> 4) & 0xf)];
588:                                            trcDump[bCounter++] = hexDigit__[(lineCounter & 0xf)];
589:                                            bCounter += 3;
590:                                            // Bump up the line counter.
591:                                            lineCounter += 0x10;
592:                                        }
593:                                    } else {
594:                                        // 8 bytes were processed so move the counter to adjust for
595:                                        // spaces between the columns of bytes.
596:                                        bCounter += 2;
597:                                    }
598:                                }
599:                                // do this until we all the data has been traced.
600:                            } while (i < len);
601:
602:                            // print the last line and add some blank lines to make it easier to read.
603:                            if (len % 16 != 0) {
604:                                dncnetprintln(trcDump);
605:                            }
606:                        }
607:                    }
608:                    dncnetprintln("");
609:                }
610:            }
611:
612:            // Gets the int value of the two byte unsigned codepoint.
613:            private static int getCodePoint(byte[] buff, int offset) {
614:                return ((buff[offset++] & 0xff) << 8)
615:                        + ((buff[offset] & 0xff) << 0);
616:            }
617:
618:            private static String getHeader(int type) {
619:                switch (type) {
620:                case TYPE_TRACE_SEND:
621:                    return sendHeader__;
622:                case TYPE_TRACE_RECEIVE:
623:                    return receiveHeader__;
624:                default:
625:                    return null;
626:                }
627:            }
628:
629:            private static int getStartPosition(int type) {
630:                switch (type) {
631:                case TYPE_TRACE_SEND:
632:                    return 20; // This is right after 'SEND BUFFER: '.
633:                case TYPE_TRACE_RECEIVE:
634:                    return 23; // This is right after 'RECEIVE BUFFER: '.
635:                default:
636:                    return 0;
637:                }
638:            }
639:
640:            private void printHeaderWithCodePointName(String codePointName,
641:                    int type) {
642:                // Create a char array so some of the characters
643:                // can be replaced with the name of the codepoint.
644:                char headerArray[] = getHeader(type).toCharArray();
645:
646:                // At most, 16 character name will be used.  This is so
647:                // the headers on top of the ascii and ebcdic rows aren't shifted.
648:                int replaceLen = (codePointName.length() < 17) ? codePointName
649:                        .length() : 16;
650:
651:                int offset = getStartPosition(type);
652:                for (int i = 0; i < replaceLen; i++) {
653:                    headerArray[offset++] = codePointName.charAt(i);
654:                }
655:                dncnetprintln(headerArray);
656:            }
657:
658:            private void dncnetprint(String s) {
659:                synchronized (printWriter_) {
660:                    printWriter_.print("[derby] " + s);
661:                    printWriter_.flush();
662:                }
663:            }
664:
665:            private void dncnetprintln(String s) {
666:                synchronized (printWriter_) {
667:                    printWriter_.println("[derby] " + s);
668:                    printWriter_.flush();
669:                }
670:            }
671:
672:            private void dncnetprintln(char[] s) {
673:                synchronized (printWriter_) {
674:                    printWriter_.print("[derby] ");
675:                    printWriter_.println(s);
676:                    printWriter_.flush();
677:                }
678:            }
679:        }
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