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one/include/PoolObjectSQL.h

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/* -------------------------------------------------------------------------- */
/* Copyright 2002-2012, OpenNebula Project Leads (OpenNebula.org) */
/* */
/* Licensed under the Apache License, Version 2.0 (the "License"); you may */
/* not use this file except in compliance with the License. You may obtain */
/* a copy of the License at */
/* */
/* http://www.apache.org/licenses/LICENSE-2.0 */
/* */
/* Unless required by applicable law or agreed to in writing, software */
/* distributed under the License is distributed on an "AS IS" BASIS, */
/* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. */
/* See the License for the specific language governing permissions and */
/* limitations under the License. */
/* -------------------------------------------------------------------------- */
#ifndef POOL_OBJECT_SQL_H_
#define POOL_OBJECT_SQL_H_
#include "ObjectSQL.h"
#include "ObjectXML.h"
#include "Template.h"
#include <pthread.h>
#include <string.h>
using namespace std;
class PoolObjectAuth;
/**
* PoolObject class. Provides a SQL backend interface for Pool components. Each
* object is identified with and unique OID
*
* Note: The PoolObject provides a synchronization mechanism (mutex). This
* implementation assumes that the mutex IS LOCKED when the class destructor
* is called.
*/
class PoolObjectSQL : public ObjectSQL, public ObjectXML
{
public:
/* ---------------------------------------------------------------------- */
/* Class Constructors & Constants */
/* ---------------------------------------------------------------------- */
/**
* OpenNebula objects. This definitions are used by other core components
* like the AuthZ/AuthN module
*/
enum ObjectType
{
VM = 0x0000001000000000LL,
HOST = 0x0000002000000000LL,
NET = 0x0000004000000000LL,
IMAGE = 0x0000008000000000LL,
USER = 0x0000010000000000LL,
TEMPLATE = 0x0000020000000000LL,
GROUP = 0x0000040000000000LL,
ACL = 0x0000080000000000LL,
DATASTORE = 0x0000100000000000LL,
CLUSTER = 0x0000200000000000LL
};
static string type_to_str(ObjectType ob)
{
switch (ob)
{
case VM: return "VM" ; break;
case HOST: return "HOST" ; break;
case NET: return "NET" ; break;
case IMAGE: return "IMAGE" ; break;
case USER: return "USER" ; break;
case TEMPLATE: return "TEMPLATE" ; break;
case GROUP: return "GROUP" ; break;
case ACL: return "ACL" ; break;
case DATASTORE: return "DATASTORE" ; break;
case CLUSTER: return "CLUSTER" ; break;
default: return "";
}
};
/* ---------------------------------------------------------------------- */
PoolObjectSQL(int id,
ObjectType _obj_type,
const string& _name,
int _uid,
int _gid,
const string& _uname,
const string& _gname,
const char * _table)
:ObjectSQL(),
ObjectXML(),
oid(id),
obj_type(_obj_type),
name(_name),
uid(_uid),
gid(_gid),
uname(_uname),
gname(_gname),
valid(true),
owner_u(1),
owner_m(1),
owner_a(0),
group_u(0),
group_m(0),
group_a(0),
other_u(0),
other_m(0),
other_a(0),
obj_template(0),
table(_table)
{
pthread_mutex_init(&mutex,0);
};
virtual ~PoolObjectSQL()
{
pthread_mutex_unlock(&mutex);
pthread_mutex_destroy(&mutex);
};
/* --------------------------------------------------------------------- */
int get_oid() const
{
return oid;
};
ObjectType get_type() const
{
return obj_type;
};
const string& get_name() const
{
return name;
};
int get_uid() const
{
return uid;
};
int get_gid() const
{
return gid;
};
/**
* Changes the object's owner
* @param _uid New User ID
* @param _uname Name of the new user
*/
void set_user(int _uid, const string& _uname)
{
uid = _uid;
uname = _uname;
}
/**
* Changes the object's group id
* @param _gid New Group ID
* @param _gname Name of the new group
*/
void set_group(int _gid, const string& _gname)
{
gid = _gid;
gname = _gname;
};
/**
* Changes the object's permissions
*
* @param _owner_u New permission: 1 allow, 0 deny, -1 do not change
* @param _owner_m New permission: 1 allow, 0 deny, -1 do not change
* @param _owner_a New permission: 1 allow, 0 deny, -1 do not change
* @param _group_u New permission: 1 allow, 0 deny, -1 do not change
* @param _group_m New permission: 1 allow, 0 deny, -1 do not change
* @param _group_a New permission: 1 allow, 0 deny, -1 do not change
* @param _other_u New permission: 1 allow, 0 deny, -1 do not change
* @param _other_m New permission: 1 allow, 0 deny, -1 do not change
* @param _other_a New permission: 1 allow, 0 deny, -1 do not change
* @param error_str Returns the error reason, if any
*
* @return 0 on success
*/
virtual int set_permissions(int _owner_u,
int _owner_m,
int _owner_a,
int _group_u,
int _group_m,
int _group_a,
int _other_u,
int _other_m,
int _other_a,
string& error_str);
/* --------------------------------------------------------------------- */
/**
* Check if the object is valid
* @return true if object is valid
*/
const bool& isValid() const
{
return valid;
};
/**
* Set the object valid flag
* @param _valid new valid flag
*/
void set_valid(const bool _valid)
{
valid = _valid;
};
/**
* Function to lock the object
*/
void lock()
{
pthread_mutex_lock(&mutex);
};
/**
* Function to unlock the object
*/
void unlock()
{
pthread_mutex_unlock(&mutex);
};
/**
* Function to print the object into a string in XML format
* base64 encoded
* @param xml the resulting XML string
* @return a reference to the generated string
*/
virtual string& to_xml64(string &xml64);
/**
* Function to print the object into a string in XML format
* @param xml the resulting XML string
* @return a reference to the generated string
*/
virtual string& to_xml(string& xml) const = 0;
/**
* Rebuilds the object from an xml formatted string
* @param xml_str The xml-formatted string
*
* @return 0 on success, -1 otherwise
*/
virtual int from_xml(const string &xml_str) = 0;
// ------------------------------------------------------------------------
// Template
// ------------------------------------------------------------------------
/**
* Gets the values of a template attribute
* @param name of the attribute
* @param values of the attribute
* @return the number of values
*/
int get_template_attribute(
const char * name,
vector<const Attribute*>& values) const
{
return obj_template->get(name,values);
};
/**
* Gets a string based attribute (single)
* @param name of the attribute
* @param value of the attribute (a string), will be "" if not defined or
* not a single attribute
*/
void get_template_attribute(
const char * name,
string& value) const
{
obj_template->get(name,value);
}
/**
* Gets an removes a string based attribute (single)
* @param name of the attribute
* @param value of the attribute (a string), will be "" if not defined or
* not a single attribute
* @return the number of attributes erased
*/
int erase_template_attribute(
const char * name,
string& value)
{
obj_template->get(name,value);
return obj_template->erase(name);
}
/**
* Gets an int based attribute (single)
* @param name of the attribute
* @param value of the attribute (an int), will be 0 if not defined or
* not a single attribute
*/
void get_template_attribute(
const char * name,
int& value) const
{
obj_template->get(name,value);
}
/**
* Adds a new attribute to the template (replacing it if
* already defined), the object's mutex SHOULD be locked
* @param name of the new attribute
* @param value of the new attribute
* @return 0 on success
*/
int replace_template_attribute(
const string& name,
const string& value)
{
SingleAttribute * sattr = new SingleAttribute(name,value);
obj_template->erase(sattr->name());
obj_template->set(sattr);
return 0;
}
/**
* Generates a XML string for the template of the Object
* @param xml the string to store the XML description.
*/
string& template_to_xml(string &xml) const
{
return obj_template->to_xml(xml);
}
/**
* Removes an Image attribute
* @param name of the attribute
*/
int remove_template_attribute(const string& name)
{
return obj_template->erase(name);
}
/**
* Sets an error message for the VM in the template
* @param message
* @return 0 on success
*/
void set_template_error_message(const string& message);
/**
* Factory method for templates, it should be implemented
* by classes that uses templates
* @return a new template
*/
virtual Template * get_new_template()
{
return 0;
}
/**
* Replace template for this object. Object should be updated
* after calling this method
* @param tmpl string representation of the template
*/
virtual int replace_template(const string& tmpl_str, string& error);
/**
* Fills a auth class to perform an authZ/authN request based on the object
* attributes
* @param auths to be filled
*/
void get_permissions(PoolObjectAuth& auths);
protected:
/**
* Callback function to unmarshall a PoolObjectSQL
* @param num the number of columns read from the DB
* @param names the column names
* @param vaues the column values
* @return 0 on success
*/
int select_cb(void *nil, int num, char **values, char **names)
{
if ( (!values[0]) || (num != 1) )
{
return -1;
}
return from_xml(values[0]);
};
/**
* Reads the PoolObjectSQL (identified by its OID) from the database.
* @param db pointer to the db
* @return 0 on success
*/
virtual int select(SqlDB *db);
/**
* Reads the PoolObjectSQL (identified by its OID) from the database.
* @param db pointer to the db
* @return 0 on success
*/
virtual int select(SqlDB *db, const string& _name, int _uid);
/**
* Drops object from the database
* @param db pointer to the db
* @return 0 on success
*/
virtual int drop(SqlDB *db);
/**
* Function to output a pool object into a stream in XML format
* @param oss the output stream
* @param num the number of columns read from the DB
* @param names the column names
* @param vaues the column values
* @return 0 on success
*/
static int dump(ostringstream& oss, int num, char **values, char **names)
{
if ( (!values[0]) || (num != 1) )
{
return -1;
}
oss << values[0];
return 0;
};
/**
* Prints the permissions into a string in XML format
* @param xml the resulting XML string
* @return a reference to the generated string
*/
string& perms_to_xml(string& xml) const;
/**
* Rebuilds the object permissions from the xml. ObjectXML::update_from_str
* must be called before this method
*
* @return 0 on success, -1 otherwise
*/
int perms_from_xml();
/**
* Sets the permission attribute to the new_perm value, if it is different
* from -1
*
* @param perm the permissions attribute, must be -1, 0 or 1, its value
* must be checked before
* @param new_perm the new value. If it is -1, it will be ignored
*/
void set_perm(int &perm, const int &new_perm)
{
if ( new_perm != -1 )
{
perm = new_perm;
}
};
/**
* The object's unique ID
*/
int oid;
/**
* The object type
*/
ObjectType obj_type;
/**
* The object's name
*/
string name;
/**
* Object's owner, set it to -1 if owner is not used
*/
int uid;
/**
* Object's group, set it to -1 if group is not used
*/
int gid;
/**
* Name of the object's owner, empty if owner is not used
*/
string uname;
/**
* Name of the object's group,, empty if group is not used
*/
string gname;
/**
* The contents of this object are valid
*/
bool valid;
/**
* Permissions for the owner user
*/
int owner_u;
int owner_m;
int owner_a;
/**
* Permissions for users in the object's group
*/
int group_u;
int group_m;
int group_a;
/**
* Permissions for the rest
*/
int other_u;
int other_m;
int other_a;
/**
* Template for this object, will be allocated if needed
*/
Template * obj_template;
private:
/**
* The PoolSQL, friend to easily manipulate its Objects
*/
friend class PoolSQL;
/**
* The mutex for the PoolObject. This implementation assumes that the mutex
* IS LOCKED when the class destructor is called.
*/
pthread_mutex_t mutex;
/**
* Pointer to the SQL table for the PoolObjectSQL
*/
const char * table;
/**
* Name for the error messages attribute
*/
static const char * error_attribute_name;
};
#endif /*POOL_OBJECT_SQL_H_*/
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