Drizzled Public API Documentation

transactional_storage_engine.cc
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20 
21 #include <config.h>
22 
23 #include <drizzled/plugin/transactional_storage_engine.h>
24 #include <drizzled/resource_context.h>
25 #include <drizzled/session.h>
26 
27 #include <vector>
28 #include <algorithm>
29 #include <functional>
30 
31 namespace drizzled {
32 namespace plugin {
33 
34 static std::vector<TransactionalStorageEngine*> g_engines;
35 
36 TransactionalStorageEngine::TransactionalStorageEngine(const std::string &name_arg,
37  const std::bitset<HTON_BIT_SIZE> &flags_arg)
38  : StorageEngine(name_arg, flags_arg)
39 {
40 }
41 
42 void TransactionalStorageEngine::setTransactionReadWrite(Session& session)
43 {
44  ResourceContext& resource_context= session.getResourceContext(*this);
45 
46  /*
47  When a storage engine method is called, the transaction must
48  have been started, unless it's a DDL call, for which the
49  storage engine starts the transaction internally, and commits
50  it internally, without registering in the ha_list.
51  Unfortunately here we can't know know for sure if the engine
52  has registered the transaction or not, so we must check.
53  */
54  if (resource_context.isStarted())
55  resource_context.markModifiedData();
56 }
57 
77 {
78  BOOST_FOREACH(TransactionalStorageEngine* it, g_engines)
79  it->doReleaseTemporaryLatches(session);
80 }
81 
82 int TransactionalStorageEngine::notifyStartTransaction(Session *session, start_transaction_option_t options)
83 {
84  if (g_engines.empty())
85  return 0;
86  std::vector<int> results;
87  results.reserve(g_engines.size());
88  BOOST_FOREACH(TransactionalStorageEngine* it, g_engines)
89  results.push_back(it->startTransaction(session, options));
90  return *std::max_element(results.begin(), results.end());
91 }
92 
93 bool TransactionalStorageEngine::addPlugin(TransactionalStorageEngine *engine)
94 {
95  g_engines.push_back(engine);
96  return StorageEngine::addPlugin(engine);
97 }
98 
99 void TransactionalStorageEngine::removePlugin(TransactionalStorageEngine*)
100 {
101  g_engines.clear();
102 }
103 
104 } /* namespace plugin */
105 } /* namespace drizzled */
TODO: Rename this file - func.h is stupid.
Definition: engine.cc:41
static int notifyStartTransaction(Session *session, start_transaction_option_t options)