[4489] Removed RestrictedConstPtr class.

src/lib/dhcpsrv/mysql_host_data_source.cc

@@ -11,6 +11,7 @@
 #include <dhcp/option_definition.h>
 #include <dhcp/option_space.h>
 #include <dhcpsrv/cfg_option.h>
+#include <dhcpsrv/db_exceptions.h>
 #include <dhcpsrv/dhcpsrv_log.h>
 #include <dhcpsrv/mysql_host_data_source.h>
 #include <dhcpsrv/db_exceptions.h>
@@ -1760,6 +1761,15 @@ public:
                          StatementIndex stindex,
                          boost::shared_ptr<MySqlHostExchange> exchange) const;
 
+    /// @brief Throws exception if database is read only.
+    ///
+    /// This method should be called by the methods which write to the
+    /// database. If the backend is operating in read-only mode this
+    /// method will throw exception.
+    ///
+    /// @throw DbReadOnly if backend is operating in read only mode.
+    void checkReadOnly() const;
+
     /// @brief Pointer to the object representing an exchange which
     /// can be used to retrieve hosts and DHCPv4 options.
     boost::shared_ptr<MySqlHostWithOptionsExchange> host_exchange_;
@@ -2202,21 +2212,29 @@ getHost(const SubnetID& subnet_id,
     return (result);
 }
 
+void
+MySqlHostDataSourceImpl::checkReadOnly() const {
+    if (is_readonly_) {
+        isc_throw(ReadOnlyDb, "MySQL host database backend is configured to"
+                  " operate in read only mode");
+    }
+}
+
 
 MySqlHostDataSource::
 MySqlHostDataSource(const MySqlConnection::ParameterMap& parameters)
-    : impl_(new MySqlHostDataSourceImpl(parameters),
-            "MySQL host database backend is configured to"
-            " operate in read only mode") {
-    impl_.allowConstOnly(impl_->is_readonly_);
+    : impl_(new MySqlHostDataSourceImpl(parameters)) {
 }
 
 MySqlHostDataSource::~MySqlHostDataSource() {
-    delete impl_.getPtr();
+    delete impl_;
 }
 
 void
 MySqlHostDataSource::add(const HostPtr& host) {
+    // If operating in read-only mode, throw exception.
+    impl_->checkReadOnly();
+
     // Initiate MySQL transaction as we will have to make multiple queries
     // to insert host information into multiple tables. If that fails on
     // any stage, the transaction will be rolled back by the destructor of
@@ -2539,12 +2557,16 @@ std::pair<uint32_t, uint32_t> MySqlHostDataSource::getVersion() const {
 
 void
 MySqlHostDataSource::commit() {
+    // If operating in read-only mode, throw exception.
+    impl_->checkReadOnly();
     impl_->conn_.commit();
 }
 
 
 void
 MySqlHostDataSource::rollback() {
+    // If operating in read-only mode, throw exception.
+    impl_->checkReadOnly();
     impl_->conn_.rollback();
 }
 

src/lib/dhcpsrv/mysql_host_data_source.h

@@ -10,7 +10,6 @@
 #include <dhcpsrv/base_host_data_source.h>
 #include <dhcpsrv/db_exceptions.h>
 #include <dhcpsrv/mysql_connection.h>
-#include <util/pointer_util.h>
 
 namespace isc {
 namespace dhcp {
@@ -257,7 +256,7 @@ public:
 private:
 
     /// @brief Pointer to the implementation of the @ref MySqlHostDataSource.
-    util::RestrictedConstPtr<MySqlHostDataSourceImpl, ReadOnlyDb> impl_;
+    MySqlHostDataSourceImpl* impl_;
 };
 
 }

src/lib/dhcpsrv/pgsql_host_data_source.cc

@@ -10,6 +10,7 @@
 #include <dhcp/option.h>
 #include <dhcp/option_definition.h>
 #include <dhcp/option_space.h>
+#include <dhcpsrv/db_exceptions.h>
 #include <dhcpsrv/cfg_option.h>
 #include <dhcpsrv/dhcpsrv_log.h>
 #include <dhcpsrv/pgsql_host_data_source.h>
@@ -1230,6 +1231,14 @@ public:
                          StatementIndex stindex,
                          boost::shared_ptr<PgSqlHostExchange> exchange) const;
 
+    /// @brief Throws exception if database is read only.
+    ///
+    /// This method should be called by the methods which write to the
+    /// database. If the backend is operating in read-only mode this
+    /// method will throw exception.
+    ///
+    /// @throw DbReadOnly if backend is operating in read only mode.
+    void checkReadOnly() const;
 
     /// @brief Returns PostgreSQL schema version of the open database
     ///
@@ -1661,23 +1670,32 @@ std::pair<uint32_t, uint32_t> PgSqlHostDataSourceImpl::getVersion() const {
     return (std::make_pair<uint32_t, uint32_t>(version, minor));
 }
 
+void
+PgSqlHostDataSourceImpl::checkReadOnly() const {
+    if (is_readonly_) {
+        isc_throw(ReadOnlyDb, "PostgreSQL host database backend is configured"
+                  " to operate in read only mode");
+    }
+}
+
+
 /*********** PgSqlHostDataSource *********************/
 
 
 PgSqlHostDataSource::
 PgSqlHostDataSource(const PgSqlConnection::ParameterMap& parameters)
-    : impl_(new PgSqlHostDataSourceImpl(parameters),
-            "PostgreSQL host database backend is configured to"
-            " operate in read only mode") {
-    impl_.allowConstOnly(impl_->is_readonly_);
+    : impl_(new PgSqlHostDataSourceImpl(parameters)) {
 }
 
 PgSqlHostDataSource::~PgSqlHostDataSource() {
-    delete impl_.getPtr();
+    delete impl_;
 }
 
 void
 PgSqlHostDataSource::add(const HostPtr& host) {
+    // If operating in read-only mode, throw exception.
+    impl_->checkReadOnly();
+
     // Initiate PostgreSQL transaction as we will have to make multiple queries
     // to insert host information into multiple tables. If that fails on
     // any stage, the transaction will be rolled back by the destructor of
@@ -1928,12 +1946,16 @@ std::pair<uint32_t, uint32_t> PgSqlHostDataSource::getVersion() const {
 
 void
 PgSqlHostDataSource::commit() {
+    // If operating in read-only mode, throw exception.
+    impl_->checkReadOnly();
     impl_->conn_.commit();
 }
 
 
 void
 PgSqlHostDataSource::rollback() {
+    // If operating in read-only mode, throw exception.
+    impl_->checkReadOnly();
     impl_->conn_.rollback();
 }
 

src/lib/dhcpsrv/pgsql_host_data_source.h

@@ -8,10 +8,8 @@
 #define PGSQL_HOST_DATA_SOURCE_H
 
 #include <dhcpsrv/base_host_data_source.h>
-#include <dhcpsrv/db_exceptions.h>
 #include <dhcpsrv/pgsql_connection.h>
 #include <dhcpsrv/pgsql_exchange.h>
-#include <util/pointer_util.h>
 
 namespace isc {
 namespace dhcp {
@@ -288,7 +286,7 @@ public:
 private:
 
     /// @brief Pointer to the implementation of the @ref PgSqlHostDataSource.
-    util::RestrictedConstPtr<PgSqlHostDataSourceImpl, ReadOnlyDb> impl_;
+    PgSqlHostDataSourceImpl* impl_;
 };
 
 }

src/lib/util/pointer_util.h

-// Copyright (C) 2015-2016 Internet Systems Consortium, Inc. ("ISC")
+// Copyright (C) 2015 Internet Systems Consortium, Inc. ("ISC")
 //
 // This Source Code Form is subject to the terms of the Mozilla Public
 // License, v. 2.0. If a copy of the MPL was not distributed with this
@@ -7,49 +7,9 @@
 #ifndef POINTER_UTIL_H
 #define POINTER_UTIL_H
 
-#include <exceptions/exceptions.h>
-#include <string>
-
 namespace isc {
 namespace util {
 
-template <typename T, typename E>
-class RestrictedConstPtr {
-public:
-
-    RestrictedConstPtr(T* ptr, const std::string& error_text)
-        : ptr_(ptr), const_only_(false), error_text_(error_text) {
-    }
-
-    void allowConstOnly(const bool const_only) {
-        const_only_ = const_only;
-    }
-
-    T* operator->() const {
-        return (ptr_);
-    }
-
-    T* operator->() {
-        if (const_only_) {
-            isc_throw(E, error_text_);
-        }
-        return (ptr_);
-    }
-
-    T* getPtr() const {
-        return (ptr_);
-    }
-
-private:
-
-    T* ptr_;
-
-    bool const_only_;
-
-    std::string error_text_;
-};
-
-
 /// @brief This function checks if two pointers are non-null and values
 /// are equal.
 ///