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db/Plugin: migrate from class Error to C++ exceptions

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This commit is contained in:
Max Kellermann
2016-10-28 23:03:07 +02:00
parent 7e5ce623fe
commit dea46e8d5a
7 changed files with 31 additions and 61 deletions
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2
src/db/DatabaseGlue.cxx
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@@ -39,5 +39,5 @@ DatabaseGlobalInit(EventLoop &loop, DatabaseListener &listener,
return nullptr;
}
return plugin->create(loop, listener, block, error);
return plugin->create(loop, listener, block);
}

6
src/db/DatabasePlugin.hxx
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@@ -27,7 +27,6 @@
#define MPD_DATABASE_PLUGIN_HXX
struct ConfigBlock;
class Error;
class EventLoop;
class DatabaseListener;
class Database;
@@ -45,10 +44,11 @@ struct DatabasePlugin {
/**
* Allocates and configures a database.
*
* Throws #std::runtime_error on error.
*/
Database *(*create)(EventLoop &loop, DatabaseListener &listener,
const ConfigBlock &block,
Error &error);
const ConfigBlock &block);
constexpr bool RequireStorage() const {
return flags & FLAG_REQUIRE_STORAGE;

49
src/db/plugins/ProxyDatabasePlugin.cxx
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@@ -82,9 +82,9 @@ public:
class ProxyDatabase final : public Database, SocketMonitor, IdleMonitor {
DatabaseListener &listener;
std::string host;
unsigned port;
bool keepalive;
const std::string host;
const unsigned port;
const bool keepalive;
struct mpd_connection *connection;
@@ -104,14 +104,11 @@ class ProxyDatabase final : public Database, SocketMonitor, IdleMonitor {
bool is_idle;
public:
ProxyDatabase(EventLoop &_loop, DatabaseListener &_listener)
:Database(proxy_db_plugin),
SocketMonitor(_loop), IdleMonitor(_loop),
listener(_listener) {}
ProxyDatabase(EventLoop &_loop, DatabaseListener &_listener,
const ConfigBlock &block);
static Database *Create(EventLoop &loop, DatabaseListener &listener,
const ConfigBlock &block,
Error &error);
const ConfigBlock &block);
virtual void Open() override;
virtual void Close() override;
@@ -141,8 +138,6 @@ public:
}
private:
bool Configure(const ConfigBlock &block, Error &error);
void Connect();
void CheckConnection();
void EnsureConnected();
@@ -338,27 +333,22 @@ SendConstraints(mpd_connection *connection, const DatabaseSelection &selection)
return true;
}
Database *
ProxyDatabase::Create(EventLoop &loop, DatabaseListener &listener,
const ConfigBlock &block, Error &error)
ProxyDatabase::ProxyDatabase(EventLoop &_loop, DatabaseListener &_listener,
const ConfigBlock &block)
:Database(proxy_db_plugin),
SocketMonitor(_loop), IdleMonitor(_loop),
listener(_listener),
host(block.GetBlockValue("host", "")),
port(block.GetBlockValue("port", 0u)),
keepalive(block.GetBlockValue("keepalive", false))
{
ProxyDatabase *db = new ProxyDatabase(loop, listener);
if (!db->Configure(block, error)) {
delete db;
db = nullptr;
}
return db;
}
bool
ProxyDatabase::Configure(const ConfigBlock &block, gcc_unused Error &error)
Database *
ProxyDatabase::Create(EventLoop &loop, DatabaseListener &listener,
const ConfigBlock &block)
{
host = block.GetBlockValue("host", "");
port = block.GetBlockValue("port", 0u);
keepalive = block.GetBlockValue("keepalive", false);
return true;
return new ProxyDatabase(loop, listener, block);
}
void
@@ -395,6 +385,9 @@ ProxyDatabase::Connect()
#if LIBMPDCLIENT_CHECK_VERSION(2, 10, 0)
mpd_connection_set_keepalive(connection, keepalive);
#else
// suppress -Wunused-private-field
(void)keepalive;
#endif
idle_received = unsigned(-1);

2
src/db/plugins/simple/SimpleDatabasePlugin.cxx
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@@ -84,7 +84,7 @@ inline SimpleDatabase::SimpleDatabase(AllocatedPath &&_path,
Database *
SimpleDatabase::Create(gcc_unused EventLoop &loop,
gcc_unused DatabaseListener &listener,
const ConfigBlock &block, Error &)
const ConfigBlock &block)
{
return new SimpleDatabase(block);
}

3
src/db/plugins/simple/SimpleDatabasePlugin.hxx
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@@ -73,8 +73,7 @@ class SimpleDatabase : public Database {
public:
static Database *Create(EventLoop &loop, DatabaseListener &listener,
const ConfigBlock &block,
Error &error);
const ConfigBlock &block);
gcc_pure
Directory &GetRoot() {

22
src/db/plugins/upnp/UpnpDatabasePlugin.cxx
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@@ -77,8 +77,7 @@ public:
UpnpDatabase():Database(upnp_db_plugin) {}
static Database *Create(EventLoop &loop, DatabaseListener &listener,
const ConfigBlock &block,
Error &error);
const ConfigBlock &block);
virtual void Open() override;
virtual void Close() override;
@@ -103,9 +102,6 @@ public:
return 0;
}
protected:
bool Configure(const ConfigBlock &block, Error &error);
private:
bool VisitServer(const ContentDirectoryService &server,
const std::list<std::string> &vpath,
@@ -150,21 +146,9 @@ private:
Database *
UpnpDatabase::Create(gcc_unused EventLoop &loop,
gcc_unused DatabaseListener &listener,
const ConfigBlock &block, Error &error)
const ConfigBlock &)
{
UpnpDatabase *db = new UpnpDatabase();
if (!db->Configure(block, error)) {
delete db;
return nullptr;
}
return db;
}
inline bool
UpnpDatabase::Configure(const ConfigBlock &, Error &)
{
return true;
return new UpnpDatabase();
}
void

8
test/DumpDatabase.cxx
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@@ -127,13 +127,7 @@ try {
if (path != nullptr)
block.AddBlockParam("path", path->value.c_str(), path->line);
Database *db = plugin->create(event_loop, database_listener,
block, error);
if (db == nullptr) {
cerr << error.GetMessage() << endl;
return EXIT_FAILURE;
}
Database *db = plugin->create(event_loop, database_listener, block);
AtScopeExit(db) { delete db; };