public OMultiFileSegment(
final OStorageLocal iStorage,
final OStorageSegmentConfiguration iConfig,
final String iFileExtension,
final int iRoundMaxSize)
throws IOException {
super(iStorage, iConfig.name);
config = iConfig;
fileExtension = iFileExtension;
type = iConfig.fileType;
defrag = iConfig.defrag;
maxSize = OFileUtils.getSizeAsNumber(iConfig.maxSize);
fileStartSize = (int) OFileUtils.getSizeAsNumber(iConfig.fileStartSize);
final int tmpFileMaxSize = (int) OFileUtils.getSizeAsNumber(iConfig.fileMaxSize);
fileIncrementSize = (int) OFileUtils.getSizeAsNumber(iConfig.fileIncrementSize);
if (iRoundMaxSize > 0)
// ROUND THE FILE SIZE TO AVOID ERRORS ON ROUNDING BY DIVIDING FOR FIXED RECORD SIZE
fileMaxSize = (tmpFileMaxSize / iRoundMaxSize) * iRoundMaxSize;
else fileMaxSize = tmpFileMaxSize;
// INSTANTIATE ALL THE FILES
int perFileMaxSize;
if (iConfig.infoFiles.length == 0) {
// EMPTY FILE: CREATE THE FIRST FILE BY DEFAULT
files = new OFile[1];
files[0] =
OFileFactory.instance()
.create(
type,
iStorage
.getVariableParser()
.resolveVariables(
config.getLocation() + "/" + name + "." + 0 + fileExtension),
iStorage.getMode());
perFileMaxSize = fileMaxSize;
files[0].setMaxSize(perFileMaxSize);
files[0].setIncrementSize(fileIncrementSize);
} else {
files = new OFile[iConfig.infoFiles.length];
for (int i = 0; i < files.length; ++i) {
files[i] =
OFileFactory.instance()
.create(
type,
iStorage.getVariableParser().resolveVariables(iConfig.infoFiles[i].path),
iStorage.getMode());
perFileMaxSize = fileMaxSize;
files[i].setMaxSize(perFileMaxSize);
files[i].setIncrementSize(fileIncrementSize);
}
}
}
private OFile createNewFile() throws IOException {
final int num = files.length - 1;
final OFile file =
OFileFactory.instance()
.create(
type,
config.getLocation() + "/" + name + "." + num + fileExtension,
storage.getMode());
file.setMaxSize(fileMaxSize);
file.create(fileStartSize);
files[num] = file;
addInfoFileConfigEntry(file);
return file;
}
private void addInfoFileConfigEntry(final OFile file) throws IOException {
OStorageFileConfiguration[] newConfigFiles =
new OStorageFileConfiguration[config.infoFiles.length + 1];
for (int i = 0; i < config.infoFiles.length; ++i) newConfigFiles[i] = config.infoFiles[i];
config.infoFiles = newConfigFiles;
// CREATE A NEW ENTRY FOR THE NEW FILE
String fileNameToStore =
storage.getVariableParser().convertPathToRelative(OFileUtils.getPath(file.getPath()));
final OStorageSegmentConfiguration template = config.root.fileTemplate;
config.infoFiles[config.infoFiles.length - 1] =
new OStorageFileConfiguration(
config,
fileNameToStore,
template.fileType,
template.fileMaxSize,
template.fileIncrementSize);
}
public void truncate() throws IOException {
// SHRINK TO 0
files[0].shrink(0);
if (files.length > 1) {
// LEAVE JUST ONE FILE
for (int i = 1; i < files.length; ++i) {
if (files[i] != null) files[i].delete();
}
// UPDATE FILE STRUCTURE
final OFile f = files[0];
files = new OFile[1];
files[0] = f;
// UPDATE CONFIGURATION
final OStorageFileConfiguration fileConfig = config.infoFiles[0];
config.infoFiles = new OStorageFileConfiguration[1];
config.infoFiles[0] = fileConfig;
config.root.update();
}
}