Ccnx::BytesPtr
ObjectDb::fetchSegment(const Ccnx::Name& deviceName, sqlite3_int64 segment)
{
sqlite3_stmt* stmt;
sqlite3_prepare_v2(m_db, "SELECT content_object FROM File WHERE device_name=? AND segment=?", -1,
&stmt, 0);
CcnxCharbufPtr buf = deviceName.toCcnxCharbuf();
sqlite3_bind_blob(stmt, 1, buf->buf(), buf->length(), SQLITE_TRANSIENT);
sqlite3_bind_int64(stmt, 2, segment);
BytesPtr ret;
int res = sqlite3_step(stmt);
if (res == SQLITE_ROW) {
const unsigned char* buf = reinterpret_cast<const unsigned char*>(sqlite3_column_blob(stmt, 0));
int bufBytes = sqlite3_column_bytes(stmt, 0);
ret = make_shared<Bytes>(buf, buf + bufBytes);
}
sqlite3_finalize(stmt);
// update last used time
m_lastUsed = time(NULL);
return ret;
}
bool
ObjectDb::DoesExist(const boost::filesystem::path& folder, const Ccnx::Name& deviceName,
const std::string& hash)
{
fs::path actualFolder = folder / "objects" / hash.substr(0, 2);
bool retval = false;
sqlite3* db;
int res = sqlite3_open((actualFolder / hash.substr(2, hash.size() - 2)).c_str(), &db);
if (res == SQLITE_OK) {
sqlite3_stmt* stmt;
sqlite3_prepare_v2(db,
"SELECT count(*), count(nullif(content_object,0)) FROM File WHERE device_name=?",
-1, &stmt, 0);
CcnxCharbufPtr buf = deviceName.toCcnxCharbuf();
sqlite3_bind_blob(stmt, 1, buf->buf(), buf->length(), SQLITE_TRANSIENT);
int res = sqlite3_step(stmt);
if (res == SQLITE_ROW) {
int countAll = sqlite3_column_int(stmt, 0);
int countNonNull = sqlite3_column_int(stmt, 1);
_LOG_TRACE("Total segments: " << countAll << ", non-empty segments: " << countNonNull);
if (countAll > 0 && countAll == countNonNull) {
retval = true;
}
}
sqlite3_finalize(stmt);
}
sqlite3_close(db);
return retval;
}
void
ObjectDb::saveContentObject(const Ccnx::Name& deviceName, sqlite3_int64 segment,
const Ccnx::Bytes& data)
{
sqlite3_stmt* stmt;
sqlite3_prepare_v2(m_db, "INSERT INTO File "
"(device_name, segment, content_object) "
"VALUES (?, ?, ?)",
-1, &stmt, 0);
//_LOG_DEBUG ("Saving content object for [" << deviceName << ", seqno: " << segment << ", size: " << data.size () << "]");
CcnxCharbufPtr buf = deviceName.toCcnxCharbuf();
sqlite3_bind_blob(stmt, 1, buf->buf(), buf->length(), SQLITE_STATIC);
sqlite3_bind_int64(stmt, 2, segment);
sqlite3_bind_blob(stmt, 3, &data[0], data.size(), SQLITE_STATIC);
sqlite3_step(stmt);
//_LOG_DEBUG ("After saving object: " << sqlite3_errmsg (m_db));
sqlite3_finalize(stmt);
// update last used time
m_lastUsed = time(NULL);
}