Inode (Resin 4.0.s170329)

java.lang.Object
- com.caucho.db.blob.Inode

```
public class Inode
extends java.lang.Object
```
Represents the indexes for a BLOB or CLOB. The inode contains 16 long values
```
  0) length of the saved file
  1-14) direct fragment addresses (to 224k)
  15) pointer to the indirect block
 
```
Inline storage (120)
If the length of the blob is less than 120, the blob is stored directly in the inode.
mini fragment storage (3840)
If the length of the blob is less than 3840, the blob is stored in mini-fragments of size 256 pointed by the inode's addresses. The maximum wasted space for mini-fragment storage is 255 bytes.
direct block storage
The first 14 block pointers (224k)
indirect storage
The indirect block (a 16k block) itself is divided into sections:
```
  0-1023) single indirect fragment addresses (16M, 2^24)
  1024-1535) double indirect block addresses (16G, 2^34)
  1536-2047) triple indirect block addresses (to 8T, 2^43)
 
```

Field Summary

Fields
Modifier and Type	Field and Description
`static int`	`BLOCK_SIZE`
`static int`	`DIRECT_BLOCKS`
`static long`	`DIRECT_MAX`
`static int`	`DOUBLE_INDIRECT_BLOCKS`
`static long`	`DOUBLE_INDIRECT_MAX`
`static int`	`INDIRECT_BLOCKS`
`static int`	`INLINE_BLOB_SIZE`
`static long`	`INLINE_MAX`
`static int`	`INODE_SIZE`
`static int`	`MINI_FRAG_BLOB_SIZE`
`static int`	`MINI_FRAG_MAX`
`static int`	`MINI_FRAG_SIZE`
`static int`	`SINGLE_INDIRECT_BLOCKS`
`static long`	`SINGLE_INDIRECT_MAX`
`static int`	`TRIPLE_INDIRECT_BLOCKS`

Constructor Summary

Constructors
Constructor and Description

Inode()

Inode(BlockStore store)

Inode(BlockStore store, StoreTransaction xa)

Constructors
Constructor and Description
`Inode()`
`Inode(BlockStore store)`
`Inode(BlockStore store, StoreTransaction xa)`

Method Summary

All Methods Static Methods Instance Methods Concrete Methods
Modifier and Type	Method and Description
`byte[]`	`getBuffer()` Returns the buffer.
`long`	`getLength()` Returns the length.
`BlockStore`	`getStore()` Returns the backing store.
`void`	`init(BlockStore store, StoreTransaction xa, byte[] buffer, int offset)`
`static boolean`	`isValid(BlockStore store, byte[] bytes, int offset)` Validate the inode
`java.io.InputStream`	`openInputStream()` Opens a read stream to the inode.
`java.io.OutputStream`	`openOutputStream()` Opens a byte output stream to the inode.
`java.io.Reader`	`openReader()` Opens a char reader to the inode.
`java.io.Writer`	`openWriter()` Opens a char writer to the inode.
`static long`	`readLong(byte[] buffer, int offset)` Reads the long.
`void`	`remove()` Deletes the inode
`static void`	`writeLong(byte[] buffer, int offset, long v)` Writes the long.
`static int`	`writeToStream(byte[] inode, int inodeOffset, BlockStore store, java.io.OutputStream os, long offset, long length)` Writes the inode value to a stream.
`void`	`writeToStream(java.io.OutputStream os, long offset, long length)` Writes the inode value to a stream.
`void`	`writeToStream(OutputStreamWithBuffer os)` Writes the inode value to a stream.
`void`	`writeToStreamOld(OutputStreamWithBuffer os, long offset, long length)` Writes the inode value to a stream.
`void`	`writeToWriter(java.io.Writer writer)` Writes the inode value to a stream.

Methods inherited from class java.lang.Object
clone, equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait

Field Detail
- INODE_SIZE
```
public static final int INODE_SIZE
```
  See Also:
  
  Constant Field Values
- INLINE_BLOB_SIZE
```
public static final int INLINE_BLOB_SIZE
```
  See Also:
  
  Constant Field Values
- BLOCK_SIZE
```
public static final int BLOCK_SIZE
```
  See Also:
  
  Constant Field Values
- MINI_FRAG_SIZE
```
public static final int MINI_FRAG_SIZE
```
  See Also:
  
  Constant Field Values
- MINI_FRAG_BLOB_SIZE
```
public static final int MINI_FRAG_BLOB_SIZE
```
  See Also:
  
  Constant Field Values
- INDIRECT_BLOCKS
```
public static final int INDIRECT_BLOCKS
```
  See Also:
  
  Constant Field Values
- DIRECT_BLOCKS
```
public static final int DIRECT_BLOCKS
```
  See Also:
  
  Constant Field Values
- SINGLE_INDIRECT_BLOCKS
```
public static final int SINGLE_INDIRECT_BLOCKS
```
  See Also:
  
  Constant Field Values
- DOUBLE_INDIRECT_BLOCKS
```
public static final int DOUBLE_INDIRECT_BLOCKS
```
  See Also:
  
  Constant Field Values
- TRIPLE_INDIRECT_BLOCKS
```
public static final int TRIPLE_INDIRECT_BLOCKS
```
  See Also:
  
  Constant Field Values
- INLINE_MAX
```
public static final long INLINE_MAX
```
  See Also:
  
  Constant Field Values
- MINI_FRAG_MAX
```
public static final int MINI_FRAG_MAX
```
  See Also:
  
  Constant Field Values
- DIRECT_MAX
```
public static final long DIRECT_MAX
```
  See Also:
  
  Constant Field Values
- SINGLE_INDIRECT_MAX
```
public static final long SINGLE_INDIRECT_MAX
```
  See Also:
  
  Constant Field Values
- DOUBLE_INDIRECT_MAX
```
public static final long DOUBLE_INDIRECT_MAX
```
  See Also:
  
  Constant Field Values

Constructor Detail

Inode
```
public Inode()
```

Inode

public Inode(BlockStore store,
             StoreTransaction xa)

Inode
```
public Inode(BlockStore store)
```

Method Detail

getStore
```
public BlockStore getStore()
```
Returns the backing store.

getBuffer
```
public byte[] getBuffer()
```
Returns the buffer.

getLength
```
public long getLength()
```
Returns the length.

init

public void init(BlockStore store,
                 StoreTransaction xa,
                 byte[] buffer,
                 int offset)

openInputStream
```
public java.io.InputStream openInputStream()
```
Opens a read stream to the inode.