[#92,!13] New libkea-database library created.

src/lib/database/database_connection.cc

@@ -0,0 +1,159 @@
+// Copyright (C) 2015-2018 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
+// file, You can obtain one at http://mozilla.org/MPL/2.0/.
+
+#include <config.h>
+
+#include <database/database_connection.h>
+#include <database/db_exceptions.h>
+#include <database/db_log.h>
+#include <exceptions/exceptions.h>
+
+#include <boost/algorithm/string.hpp>
+#include <boost/foreach.hpp>
+#include <vector>
+
+using namespace std;
+
+namespace isc {
+namespace db {
+
+const time_t DatabaseConnection::MAX_DB_TIME = 2147483647;
+
+std::string
+DatabaseConnection::getParameter(const std::string& name) const {
+    ParameterMap::const_iterator param = parameters_.find(name);
+    if (param == parameters_.end()) {
+        isc_throw(BadValue, "Parameter " << name << " not found");
+    }
+    return (param->second);
+}
+
+DatabaseConnection::ParameterMap
+DatabaseConnection::parse(const std::string& dbaccess) {
+    DatabaseConnection::ParameterMap mapped_tokens;
+
+    if (!dbaccess.empty()) {
+        vector<string> tokens;
+
+        // We need to pass a string to is_any_of, not just char*. Otherwise
+        // there are cryptic warnings on Debian6 running g++ 4.4 in
+        // /usr/include/c++/4.4/bits/stl_algo.h:2178 "array subscript is above
+        // array bounds"
+        boost::split(tokens, dbaccess, boost::is_any_of(string("\t ")));
+        BOOST_FOREACH(std::string token, tokens) {
+            size_t pos = token.find("=");
+            if (pos != string::npos) {
+                string name = token.substr(0, pos);
+                string value = token.substr(pos + 1);
+                mapped_tokens.insert(make_pair(name, value));
+            } else {
+                DB_LOG_ERROR(DB_INVALID_ACCESS).arg(dbaccess);
+                isc_throw(InvalidParameter, "Cannot parse " << token
+                          << ", expected format is name=value");
+            }
+        }
+    }
+
+    return (mapped_tokens);
+}
+
+std::string
+DatabaseConnection::redactedAccessString(const ParameterMap& parameters) {
+    // Reconstruct the access string: start of with an empty string, then
+    // work through all the parameters in the original string and add them.
+    std::string access;
+    for (DatabaseConnection::ParameterMap::const_iterator i = parameters.begin();
+         i != parameters.end(); ++i) {
+
+        // Separate second and subsequent tokens are preceded by a space.
+        if (!access.empty()) {
+            access += " ";
+        }
+
+        // Append name of parameter...
+        access += i->first;
+        access += "=";
+
+        // ... and the value, except in the case of the password, where a
+        // redacted value is appended.
+        if (i->first == std::string("password")) {
+            access += "*****";
+        } else {
+            access += i->second;
+        }
+    }
+
+    return (access);
+}
+
+bool
+DatabaseConnection::configuredReadOnly() const {
+    std::string readonly_value = "false";
+    try {
+        readonly_value = getParameter("readonly");
+        boost::algorithm::to_lower(readonly_value);
+    } catch (...) {
+        // Parameter "readonly" hasn't been specified so we simply use
+        // the default value of "false".
+    }
+
+    if ((readonly_value != "false") && (readonly_value != "true")) {
+        isc_throw(DbInvalidReadOnly, "invalid value '" << readonly_value
+                  << "' specified for boolean parameter 'readonly'");
+    }
+
+    return (readonly_value == "true");
+}
+
+ReconnectCtlPtr
+DatabaseConnection::makeReconnectCtl() const {
+    ReconnectCtlPtr retry;
+    string type = "unknown";
+    unsigned int retries = 0;
+    unsigned int interval = 0;
+
+    // Assumes that parsing ensurse only valid values are present
+    try {
+        type = getParameter("type");
+    } catch (...) {
+        // Wasn't specified so we'll use default of "unknown".
+    }
+
+    std::string parm_str;
+    try {
+        parm_str = getParameter("max-reconnect-tries");
+        retries = boost::lexical_cast<unsigned int>(parm_str);
+    } catch (...) {
+        // Wasn't specified so we'll use default of 0;
+    }
+
+    try {
+        parm_str = getParameter("reconnect-wait-time");
+        interval = boost::lexical_cast<unsigned int>(parm_str);
+    } catch (...) {
+        // Wasn't specified so we'll use default of 0;
+    }
+
+    retry.reset(new ReconnectCtl(type, retries, interval));
+    return (retry);
+}
+
+bool
+DatabaseConnection::invokeDbLostCallback() const {
+    if (DatabaseConnection::db_lost_callback) {
+        // Invoke the callback, passing in a new instance of ReconnectCtl
+        return (DatabaseConnection::db_lost_callback)(makeReconnectCtl());
+    }
+
+    return (false);
+}
+
+
+DatabaseConnection::DbLostCallback
+DatabaseConnection::db_lost_callback = 0;
+
+};
+};