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Control file was not properly loading state when the the record length stored was not == to the max record length. 

git-svn-id: https://svn.apache.org/repos/asf/activemq/trunk@566202 13f79535-47bb-0310-9956-ffa450edef68
This commit is contained in:
Hiram R. Chirino 2007-08-15 14:46:03 +00:00
parent 0576de32a7
commit 926f9ce614
1 changed files with 19 additions and 6 deletions
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25
activemq-core/src/main/java/org/apache/activemq/kaha/impl/async/ControlFile.java
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@ -39,6 +39,10 @@ public final class ControlFile {
/** The File that holds the control data. */
private final RandomAccessFile randomAccessFile;
private final int maxRecordSize;
private final int firstRecordStart;
private final int secondRecordStart;
private final int firstRecordEnd;
private final int secondRecordEnd;
private long version;
private FileLock lock;
@ -47,6 +51,13 @@ public final class ControlFile {
public ControlFile(File file, int recordSize) throws IOException {
this.file = file;
this.maxRecordSize = recordSize + 4;
// Calculate where the records start and end.
this.firstRecordStart = 8;
this.secondRecordStart = 8 + maxRecordSize + 8 + 8;
this.firstRecordEnd = firstRecordStart+maxRecordSize;
this.secondRecordEnd = secondRecordStart+maxRecordSize;
randomAccessFile = new RandomAccessFile(file, "rw");
}
@ -105,26 +116,26 @@ public final class ControlFile {
return null;
}
randomAccessFile.seek(0);
randomAccessFile.seek(firstRecordStart-8);
long v1 = randomAccessFile.readLong();
randomAccessFile.seek(maxRecordSize + 8);
randomAccessFile.seek(firstRecordEnd);
long v1check = randomAccessFile.readLong();
randomAccessFile.seek(maxRecordSize + 16);
randomAccessFile.seek(secondRecordStart - 8);
long v2 = randomAccessFile.readLong();
randomAccessFile.seek((maxRecordSize * 2) + 24);
randomAccessFile.seek(secondRecordEnd);
long v2check = randomAccessFile.readLong();
byte[] data = null;
if (v2 == v2check) {
version = v2;
randomAccessFile.seek(maxRecordSize + 24);
randomAccessFile.seek(secondRecordStart);
int size = randomAccessFile.readInt();
data = new byte[size];
randomAccessFile.readFully(data);
} else if (v1 == v1check) {
version = v1;
randomAccessFile.seek(maxRecordSize + 8);
randomAccessFile.seek(firstRecordStart);
int size = randomAccessFile.readInt();
data = new byte[size];
randomAccessFile.readFully(data);
@ -147,12 +158,14 @@ public final class ControlFile {
randomAccessFile.writeLong(version);
randomAccessFile.writeInt(data.getLength());
randomAccessFile.write(data.getData());
randomAccessFile.seek(firstRecordEnd);
randomAccessFile.writeLong(version);
// Write the second copy of the control data.
randomAccessFile.writeLong(version);
randomAccessFile.writeInt(data.getLength());
randomAccessFile.write(data.getData());
randomAccessFile.seek(secondRecordEnd);
randomAccessFile.writeLong(version);
if (sync) {