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#ifndef DATASWARM_BLOB_H
#define DATASWARM_BLOB_H
#include "jx.h"
/* blob_state_t is used to track the state of blobs in workers, and the
* knowledge of blob transitions as seen by the manager. The worker only needs
* DS_BLOB_RW for new blobs declared from the manager, DS_BLOB_RO for committed blobs, and
* DS_BLOB_DELETING for blobs in the process of being deleted, and DS_BLOB_DELETED as a terminal state.
*
* The manager declares new blobs as BLOB_NEW, and only transitions to
* DS_BLOB_RW once the blob is declared in the worker, and so on. See
* manager/ds_blob_rep.h for the blob state transitions according to the
* manager. */
typedef enum {
DS_BLOB_NEW = 0,
DS_BLOB_RW, /* blobs are created as read-write */
DS_BLOB_PUT, DS_BLOB_COPIED,
DS_BLOB_RO, /* committed blobs are read-only */
DS_BLOB_GET,
DS_BLOB_DELETING,
DS_BLOB_DELETED,
DS_BLOB_ERROR
} ds_blob_state_t;
struct ds_blob {
char *blobid;
ds_blob_state_t state;
int64_t size;
char *md5hash;
struct jx *meta;
};
struct ds_blob * ds_blob_create( const char *blobid, jx_int_t size, struct jx *meta);
struct ds_blob * ds_blob_create_from_jx( struct jx *jblob );
struct ds_blob * ds_blob_create_from_file( const char *filename );
struct jx * ds_blob_to_jx( struct ds_blob *b );
int ds_blob_to_file( struct ds_blob *b, const char *filename );
void ds_blob_delete( struct ds_blob *b );
char *ds_blob_state_string( ds_blob_state_t state );
#endif
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