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h2database
提交 77d964d6 authored 作者: noelgrandin's avatar noelgrandin
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inline the "create temporary LOBs" methods into the constructor so that I can… 

inline the "create temporary LOBs" methods into the constructor so that I can make more fields final
上级 0678a27b
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正在显示 包含 91 行增加 和 67 行删除
h2/src/main/org/h2/value/ValueLobDb.java
浏览文件 @ 77d964d6
......@@ -41,17 +41,17 @@ public class ValueLobDb extends Value implements Value.ValueClob, Value.ValueBlo
private final byte[] hmac;
private final byte[] small;
private final DataHandler handler;
/**
* For a BLOB, precision is length in bytes.
* For a CLOB, precision is length in chars.
*/
private long precision;
private final long precision;
private final String fileName;
private final FileStore tempFile;
private int tableId;
private int hash;
private FileStore tempFile;
private String fileName;
private ValueLobDb(int type, DataHandler handler, int tableId, long lobId, byte[] hmac, long precision) {
this.type = type;
......@@ -61,6 +61,8 @@ public class ValueLobDb extends Value implements Value.ValueClob, Value.ValueBlo
this.hmac = hmac;
this.precision = precision;
this.small = null;
this.fileName = null;
this.tempFile = null;
}
private ValueLobDb(int type, byte[] small, long precision) {
......@@ -70,15 +72,98 @@ public class ValueLobDb extends Value implements Value.ValueClob, Value.ValueBlo
this.lobId = 0;
this.hmac = null;
this.handler = null;
this.fileName = null;
this.tempFile = null;
}
private ValueLobDb(int type, DataHandler handler) {
this.type = type;
this.handler = handler;
this.small = null;
this.precision = 0;
this.lobId = 0;
this.hmac = null;
this.fileName = null;
this.tempFile = null;
}
/**
* Create temporary CLOB from Reader.
*/
private ValueLobDb(DataHandler handler, char[] buff, int len, Reader in, long remaining) throws IOException {
this.type = Value.CLOB;
this.handler = handler;
this.small = null;
this.lobId = 0;
this.hmac = null;
this.fileName = createTempLobFileName(handler);
this.tempFile = this.handler.openFile(fileName, "rw", false);
this.tempFile.autoDelete();
FileStoreOutputStream out = new FileStoreOutputStream(tempFile, null, null);
long tmpPrecision = 0;
try {
while (true) {
tmpPrecision += len;
byte[] b = new String(buff, 0, len).getBytes(Constants.UTF8);
out.write(b, 0, b.length);
remaining -= len;
if (remaining <= 0) {
break;
}
len = getBufferSize(this.handler, false, remaining);
len = IOUtils.readFully(in, buff, len);
if (len <= 0) {
break;
}
}
} finally {
out.close();
}
this.precision = tmpPrecision;
}
/**
* Create temporary BLOB from InputStream.
*/
private ValueLobDb(DataHandler handler, byte[] buff, int len, InputStream in,
long remaining) throws IOException {
this.type = Value.BLOB;
this.handler = handler;
this.small = null;
this.lobId = 0;
this.hmac = null;
this.fileName = createTempLobFileName(handler);
this.tempFile = this.handler.openFile(fileName, "rw", false);
this.tempFile.autoDelete();
FileStoreOutputStream out = new FileStoreOutputStream(tempFile, null, null);
long tmpPrecision = 0;
boolean compress = this.handler.getLobCompressionAlgorithm(Value.BLOB) != null;
try {
while (true) {
tmpPrecision += len;
out.write(buff, 0, len);
remaining -= len;
if (remaining <= 0) {
break;
}
len = getBufferSize(this.handler, compress, remaining);
len = IOUtils.readFully(in, buff, 0, len);
if (len <= 0) {
break;
}
}
} finally {
out.close();
}
this.precision = tmpPrecision;
}
private static String createTempLobFileName(DataHandler handler) throws IOException {
String path = handler.getDatabasePath();
if (path.length() == 0) {
path = SysProperties.PREFIX_TEMP_FILE;
}
return FileUtils.createTempFile(path, Constants.SUFFIX_TEMP_FILE, true, true);
}
/**
......@@ -152,7 +237,6 @@ public class ValueLobDb extends Value implements Value.ValueClob, Value.ValueBlo
if (fileName != null) {
if (tempFile != null) {
tempFile.stopAutoDelete();
tempFile = null;
}
// synchronize on the database, to avoid concurrent temp file creation /
// deletion / backup
......@@ -447,8 +531,7 @@ public class ValueLobDb extends Value implements Value.ValueClob, Value.ValueBlo
byte[] small = new String(buff, 0, len).getBytes(Constants.UTF8);
return ValueLobDb.createSmallLob(Value.CLOB, small, len);
}
ValueLobDb lob = new ValueLobDb(Value.CLOB, handler);
lob.createTempFromReader(buff, len, in, remaining);
ValueLobDb lob = new ValueLobDb(handler, buff, len, in, remaining);
return lob;
} catch (IOException e) {
throw DbException.convertIOException(e, null);
......@@ -484,72 +567,13 @@ public class ValueLobDb extends Value implements Value.ValueClob, Value.ValueBlo
System.arraycopy(buff, 0, small, 0, len);
return ValueLobDb.createSmallLob(Value.BLOB, small, small.length);
}
ValueLobDb lob = new ValueLobDb(Value.BLOB, handler);
lob.createTempFromStream(buff, len, in, remaining);
ValueLobDb lob = new ValueLobDb(handler, buff, len, in, remaining);
return lob;
} catch (IOException e) {
throw DbException.convertIOException(e, null);
}
}
private void createTempFromReader(char[] buff, int len, Reader in, long remaining) throws IOException {
FileStoreOutputStream out = initTemp();
try {
while (true) {
precision += len;
byte[] b = new String(buff, 0, len).getBytes(Constants.UTF8);
out.write(b, 0, b.length);
remaining -= len;
if (remaining <= 0) {
break;
}
len = getBufferSize(this.handler, false, remaining);
len = IOUtils.readFully(in, buff, len);
if (len <= 0) {
break;
}
}
} finally {
out.close();
}
}
private void createTempFromStream(byte[] buff, int len, InputStream in,
long remaining) throws IOException {
FileStoreOutputStream out = initTemp();
boolean compress = this.handler.getLobCompressionAlgorithm(Value.BLOB) != null;
try {
while (true) {
precision += len;
out.write(buff, 0, len);
remaining -= len;
if (remaining <= 0) {
break;
}
len = getBufferSize(this.handler, compress, remaining);
len = IOUtils.readFully(in, buff, 0, len);
if (len <= 0) {
break;
}
}
} finally {
out.close();
}
}
private FileStoreOutputStream initTemp() throws IOException {
this.precision = 0;
String path = this.handler.getDatabasePath();
if (path.length() == 0) {
path = SysProperties.PREFIX_TEMP_FILE;
}
fileName = FileUtils.createTempFile(path, Constants.SUFFIX_TEMP_FILE, true, true);
tempFile = this.handler.openFile(fileName, "rw", false);
tempFile.autoDelete();
FileStoreOutputStream out = new FileStoreOutputStream(tempFile, null, null);
return out;
}
private static int getBufferSize(DataHandler handler, boolean compress, long remaining) {
if (remaining < 0 || remaining > Integer.MAX_VALUE) {
remaining = Integer.MAX_VALUE;
......
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