mirror of https://gitee.com/bigwinds/arangodb
274 lines
9.3 KiB
C++
274 lines
9.3 KiB
C++
////////////////////////////////////////////////////////////////////////////////
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/// @brief DB server job
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///
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/// @file
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///
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/// DISCLAIMER
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///
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/// Copyright 2004-2013 triAGENS GmbH, Cologne, Germany
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///
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/// Licensed under the Apache License, Version 2.0 (the "License");
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/// you may not use this file except in compliance with the License.
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/// You may obtain a copy of the License at
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///
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/// http://www.apache.org/licenses/LICENSE-2.0
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///
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/// Unless required by applicable law or agreed to in writing, software
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/// distributed under the License is distributed on an "AS IS" BASIS,
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/// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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/// See the License for the specific language governing permissions and
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/// limitations under the License.
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///
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/// Copyright holder is triAGENS GmbH, Cologne, Germany
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///
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/// @author Jan Steemann
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/// @author Copyright 2009-2013, triAGENS GmbH, Cologne, Germany
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////////////////////////////////////////////////////////////////////////////////
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#ifndef TRIAGENS_CLUSTER_DBSERVER_JOB_H
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#define TRIAGENS_CLUSTER_DBSERVER_JOB_H 1
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#include "Dispatcher/Job.h"
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#include "Basics/Exceptions.h"
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#include "Basics/Mutex.h"
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#include "Basics/MutexLocker.h"
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#include "BasicsC/logging.h"
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#include "Rest/Handler.h"
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#include "V8Server/ApplicationV8.h"
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#include "V8/v8-utils.h"
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#include "VocBase/server.h"
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#include "VocBase/vocbase.h"
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// -----------------------------------------------------------------------------
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// --SECTION-- class DBServerJob
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// -----------------------------------------------------------------------------
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namespace triagens {
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namespace arango {
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////////////////////////////////////////////////////////////////////////////////
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/// @brief general server job
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////////////////////////////////////////////////////////////////////////////////
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class DBServerJob : public triagens::rest::Job {
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private:
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DBServerJob (DBServerJob const&);
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DBServerJob& operator= (DBServerJob const&);
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// -----------------------------------------------------------------------------
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// --SECTION-- constructors and destructors
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// -----------------------------------------------------------------------------
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public:
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////////////////////////////////////////////////////////////////////////////////
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/// @brief constructs a new db server job
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////////////////////////////////////////////////////////////////////////////////
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DBServerJob (TRI_server_t* server,
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ApplicationV8* applicationV8)
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: Job("HttpServerJob"),
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_server(server),
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_applicationV8(applicationV8),
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_shutdown(0),
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_abandon(false) {
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}
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////////////////////////////////////////////////////////////////////////////////
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/// @brief destructs a db server job
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////////////////////////////////////////////////////////////////////////////////
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~DBServerJob () {
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}
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// -----------------------------------------------------------------------------
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// --SECTION-- public methods
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// -----------------------------------------------------------------------------
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public:
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////////////////////////////////////////////////////////////////////////////////
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/// @brief abandon job
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////////////////////////////////////////////////////////////////////////////////
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void abandon () {
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MUTEX_LOCKER(_abandonLock);
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_abandon = true;
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}
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// -----------------------------------------------------------------------------
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// --SECTION-- Job methods
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// -----------------------------------------------------------------------------
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public:
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////////////////////////////////////////////////////////////////////////////////
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/// {@inheritDoc}
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////////////////////////////////////////////////////////////////////////////////
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JobType type () {
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return Job::READ_JOB;
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}
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////////////////////////////////////////////////////////////////////////////////
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/// @brief whether or not the job is detached
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////////////////////////////////////////////////////////////////////////////////
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inline bool isDetached () const {
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return true;
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}
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////////////////////////////////////////////////////////////////////////////////
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/// {@inheritDoc}
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////////////////////////////////////////////////////////////////////////////////
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string const& queue () {
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static string const standard = "STANDARD";
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return standard;
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}
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////////////////////////////////////////////////////////////////////////////////
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/// {@inheritDoc}
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////////////////////////////////////////////////////////////////////////////////
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status_e work () {
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LOG_TRACE("starting plan update handler");
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if (_shutdown != 0) {
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return Job::JOB_DONE;
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}
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bool result = execute();
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if (result) {
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return triagens::rest::Job::JOB_DONE;
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}
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return triagens::rest::Job::JOB_FAILED;
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}
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////////////////////////////////////////////////////////////////////////////////
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/// {@inheritDoc}
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////////////////////////////////////////////////////////////////////////////////
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void cleanup () {
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delete this;
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}
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////////////////////////////////////////////////////////////////////////////////
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/// {@inheritDoc}
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////////////////////////////////////////////////////////////////////////////////
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bool beginShutdown () {
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LOG_TRACE("shutdown job %p", (void*) this);
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_shutdown = 1;
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return true;
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}
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////////////////////////////////////////////////////////////////////////////////
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/// {@inheritDoc}
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////////////////////////////////////////////////////////////////////////////////
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void handleError (basics::TriagensError const& ex) {
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}
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// -----------------------------------------------------------------------------
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// --SECTION-- private methods
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// -----------------------------------------------------------------------------
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private:
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bool execute () {
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// default to system database
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TRI_vocbase_t* vocbase = TRI_UseDatabaseServer(_server, "_system");
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if (vocbase == 0) {
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return false;
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}
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ApplicationV8::V8Context* context = _applicationV8->enterContext(vocbase, 0, false, true);
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if (context == 0) {
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TRI_ReleaseDatabaseServer(_server, vocbase);
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return false;
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}
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{
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v8::HandleScope scope;
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// execute script inside the context
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char const* file = "handle-plan-change";
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char const* content = "require('org/arangodb/cluster').handlePlanChange();";
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TRI_ExecuteJavaScriptString(v8::Context::GetCurrent(), v8::String::New(content), v8::String::New(file), false);
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}
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// get the pointer to the least used vocbase
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TRI_v8_global_t* v8g = (TRI_v8_global_t*) context->_isolate->GetData();
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void* orig = v8g->_vocbase;
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_applicationV8->exitContext(context);
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TRI_ReleaseDatabaseServer(_server, (TRI_vocbase_t*) orig);
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return true;
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}
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// -----------------------------------------------------------------------------
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// --SECTION-- private variables
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// -----------------------------------------------------------------------------
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private:
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////////////////////////////////////////////////////////////////////////////////
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/// @brief server
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////////////////////////////////////////////////////////////////////////////////
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TRI_server_t* _server;
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////////////////////////////////////////////////////////////////////////////////
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/// @brief v8 dispatcher
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////////////////////////////////////////////////////////////////////////////////
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ApplicationV8* _applicationV8;
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// -----------------------------------------------------------------------------
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// --SECTION-- protected variables
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// -----------------------------------------------------------------------------
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protected:
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////////////////////////////////////////////////////////////////////////////////
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/// @brief shutdown in progress
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////////////////////////////////////////////////////////////////////////////////
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volatile sig_atomic_t _shutdown;
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////////////////////////////////////////////////////////////////////////////////
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/// @brief server is dead lock
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////////////////////////////////////////////////////////////////////////////////
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basics::Mutex _abandonLock;
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////////////////////////////////////////////////////////////////////////////////
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/// @brief server is dead
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////////////////////////////////////////////////////////////////////////////////
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bool _abandon;
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};
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}
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}
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#endif
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// -----------------------------------------------------------------------------
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// --SECTION-- END-OF-FILE
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// -----------------------------------------------------------------------------
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// Local Variables:
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// mode: outline-minor
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// outline-regexp: "/// @brief\\|/// {@inheritDoc}\\|/// @addtogroup\\|/// @page\\|// --SECTION--\\|/// @\\}"
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// End:
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