leveldb: split up in 3 files

5 files changed, 190 insertions, 158 deletions

diff --git a/datastore-leveldb/src/db.cpp b/datastore-leveldb/src/db.cpp
new file mode 100644
index 0000000..aae378f
--- /dev/null
+++ b/datastore-leveldb/src/db.cpp
@@ -0,0 +1,55 @@
+#include "db.h"
+
+#include <iostream>
+#include <mutex>
+#include <sstream>
+#include <unordered_map>
+
+static std::unordered_map<std::string,leveldb::DB*> dbs;
+static std::mutex getDBmutex;
+
+static bool sensor_name_is_sane(std::string& name) {
+    for (auto it = name.begin(); it != name.end(); ++it) {
+        if (not ((*it >= '0' and *it <= '9') or
+                 (*it >= 'A' and *it <= 'Z') or
+                 (*it >= 'a' and *it <= 'z'))) {
+            return false;
+        }
+    }
+    return true;
+}
+
+leveldb::DB *getDB(std::string& name) {
+    getDBmutex.lock();
+    if (dbs.find(name) == dbs.end()) {
+        if (not sensor_name_is_sane(name)) {
+            getDBmutex.unlock();
+            return nullptr;
+        }
+        leveldb::DB *db;
+        leveldb::Options options;
+        options.create_if_missing = true;
+        leveldb::Status status = leveldb::DB::Open(options, "/tmp/testdb."+name, &db);
+        if (not status.ok()) {
+            std::cout << status.ToString() << std::endl;
+            getDBmutex.unlock();
+            return nullptr;
+        }
+        dbs[name] = db;
+        getDBmutex.unlock();
+        return db;
+    } else {
+        getDBmutex.unlock();
+        return dbs.at(name);
+    }
+}
+
+
+void closeDB() {
+    for (auto it = dbs.begin(); it != dbs.end(); ++it) {
+        std::cout << "Close " << (*it).first << std::endl;
+        delete (*it).second;
+        dbs.erase(it);
+    }
+}
+
diff --git a/datastore-leveldb/src/db.h b/datastore-leveldb/src/db.h
new file mode 100644
index 0000000..c7ed25b
--- /dev/null
+++ b/datastore-leveldb/src/db.h
@@ -0,0 +1,10 @@
+#ifndef HAVE_DB_H
+#define HAVE_DB_H
+
+#include <leveldb/db.h>
+
+leveldb::DB *getDB(std::string& name);
+
+void closeDB();
+
+#endif /*HAVE_DB_H*/
diff --git a/datastore-leveldb/src/main.cpp b/datastore-leveldb/src/main.cpp
index f7f2f5d..3b0dd98 100644
--- a/datastore-leveldb/src/main.cpp
+++ b/datastore-leveldb/src/main.cpp
@@ -1,159 +1,21 @@
-extern "C" {
-#include <unistd.h>
-#include <signal.h>
-#include <string.h>
-#include "mongoose.h"
-}
-
-#include <algorithm>
-#include <iostream>
-#include <iomanip>
-#include <string>
-#include <sstream>
-#include <map>
+#include <csignal>
 #include <forward_list>
 #include <functional>
-#include <mutex>
+#include <chrono>
+#include <thread>
 
 #include <boost/regex.hpp>
+#include "mongoose.h"
 
-#include "leveldb/db.h"
-#include "leveldb/comparator.h"
+#include "db.h"
+#include "web.h"
 
-std::forward_list<std::pair<boost::regex,std::function<void(const boost::cmatch&, struct mg_connection *conn)>>> web_handler;
+typedef void(web_handler_t)(const boost::cmatch&, struct mg_connection *conn);
 
-static std::map<std::string,leveldb::DB*> dbs;
+std::forward_list<std::pair<boost::regex,std::function<web_handler_t>>> web_handler;
 
 struct mg_context *ctx;
 
-bool sensor_name_is_sane(std::string& name) {
-    for (auto it = name.begin(); it != name.end(); ++it) {
-        if (not (*it >= '0' and *it <= '9' or
-                 *it >= 'A' and *it <= 'Z' or
-                 *it >= 'a' and *it <= 'z')) {
-            return false;
-        }
-    }
-    return true;
-}
-
-std::mutex getDBmutex;
-
-leveldb::DB *getDB(std::string& name) {
-    getDBmutex.lock();
-    if (dbs.find(name) == dbs.end()) {
-        if (not sensor_name_is_sane(name)) {
-            getDBmutex.unlock();
-            return nullptr;
-        }
-        leveldb::DB *db;
-        leveldb::Options options;
-        options.create_if_missing = true;
-        leveldb::Status status = leveldb::DB::Open(options, "/tmp/testdb."+name, &db);
-        if (not status.ok()) {
-            std::cout << status.ToString() << std::endl;
-            getDBmutex.unlock();
-            return nullptr;
-        }
-        dbs[name] = db;
-        getDBmutex.unlock();
-        return db;
-    } else {
-        getDBmutex.unlock();
-        return dbs.at(name);
-    }
-}
-
-std::string make_key(uint64_t timestamp) {
-    std::stringstream key;
-    key << "ts-";
-    key << std::setfill('0') << std::setw(20) << timestamp;
-    return key.str();
-}
-
-void web_handle_api_value(const boost::cmatch &match, struct mg_connection *conn) {
-    const struct mg_request_info *request_info = mg_get_request_info(conn);
-
-    std::string sensor(match[1].str());
-    uint64_t timestamp = std::stoul(match[2].str());
-    char buf[1024];
-    int count = mg_read(conn, buf, 1024);
-    std::string value(buf, count);
-
-    leveldb::DB *db = getDB(sensor);
-    if (db == nullptr) {
-        std::cout << "failed to get db for " << sensor << std::endl;
-        mg_printf(conn, "HTTP/1.1 500 Internal Error\r\n\r\n");
-        return;
-    }
-
-    std::cout << "sensor=" << sensor << " key=" << make_key(timestamp) << std::endl;
-    db->Put(leveldb::WriteOptions(), make_key(timestamp), value);
-    mg_printf(conn, "HTTP/1.1 200 Value received\r\n\r\n");
-}
-
-void web_handle_api_range(const boost::cmatch &match, struct mg_connection *conn) {
-    static const leveldb::Comparator *cmp = leveldb::BytewiseComparator();
-
-    std::string sensor(match[1].str());
-    uint64_t start = std::stoul(match[2].str());
-    uint64_t end = std::stoul(match[3].str());
-    std::string key_start(std::move(make_key(start)));
-    std::string key_end(std::move(make_key(end)));
-
-    leveldb::DB *db = getDB(sensor);
-    if (db == nullptr) {
-        mg_printf(conn, "HTTP/1.1 500 Internal Error\r\n\r\n");
-        return;
-    }
-
-    mg_printf(conn,
-            "HTTP/1.1 200 Value received\r\n"
-            "Content-Type: application/json; encoding=UTF-8\r\n"
-            "\r\n");
-
-    std::cout << "sensor=" << sensor << " start=" << start << " end=" << end << std::endl;
-
-    std::ostringstream out;
-    out << "{'sensor':'" << sensor << "', 'error':null, 'data':[";
-    mg_write(conn, out.str().c_str(), out.str().size());
-
-    leveldb::Iterator* it = db->NewIterator(leveldb::ReadOptions());
-    bool first = true;
-    std::ostringstream outbuf;
-    for (it->Seek(key_start); 
-            it->Valid() && cmp->Compare(it->key(), key_end) < 0;
-            it->Next()) {
-        const char *key = it->key().data();
-        size_t key_size =  it->key().size();
-        if (key_size != 20+3) {
-            std::cerr << "invalid key" << std::endl;
-            return;
-        }
-
-        int offset = 3; //ts-
-        // skip zeros in timestamp
-        while (offset < key_size-1 and *(key+offset) == '0')
-            offset++;
-
-        if (first)
-            first = false;
-        else
-            outbuf << ',';
-
-        outbuf << '[';
-        outbuf.write(key+offset, key_size-offset);
-        outbuf << ',';
-        outbuf.write(it->value().data(), it->value().size());
-        outbuf << ']';
-
-        mg_write(conn, outbuf.str().c_str(), outbuf.tellp());
-        outbuf.seekp(0);
-    }
-    mg_printf(conn, "]}\r\n");
-    delete it;
-}
-
 int begin_request_handler(struct mg_connection *conn) {
     boost::cmatch match;
 
@@ -169,23 +31,15 @@ int begin_request_handler(struct mg_connection *conn) {
     return 0;
 }
 
-
 struct sigaction old_action;
 
+// Stop the server.
 void sigint_handler(int s) {
-    // Stop the server.
     mg_stop(ctx);
-
-    // Close databases
-    for (auto it = dbs.begin(); it != dbs.end(); ++it) {
-        std::cout << "Close " << (*it).first << std::endl;
-        delete (*it).second;
-        dbs.erase(it);
-    }
+    closeDB();
     exit(0);
 }
 
-
 int main(int argc, char **argv) {
     struct mg_callbacks callbacks;
     const char *options[] = {
@@ -196,7 +50,6 @@ int main(int argc, char **argv) {
     memset(&callbacks, 0, sizeof(callbacks));
     callbacks.begin_request = begin_request_handler;
 
-
     // Routing
     web_handler.push_front(std::make_pair(
                 boost::regex("/api/value/([a-zA-Z0-9]+)/([0-9]+)"),
@@ -214,6 +67,7 @@ int main(int argc, char **argv) {
 
     // Start the web server.
     ctx = mg_start(&callbacks, NULL, options);
-    pause();
+    while (1) 
+        std::this_thread::sleep_for(std::chrono::seconds(1));
     return 1;
 }
diff --git a/datastore-leveldb/src/web.cpp b/datastore-leveldb/src/web.cpp
new file mode 100644
index 0000000..4898451
--- /dev/null
+++ b/datastore-leveldb/src/web.cpp
@@ -0,0 +1,95 @@
+#include "web.h"
+#include "db.h"
+#include <leveldb/comparator.h>
+#include <iomanip>
+
+static inline std::string make_key(uint64_t timestamp) {
+    std::stringstream key;
+    key << "ts-";
+    key << std::setfill('0') << std::setw(20) << timestamp;
+    return key.str();
+}
+
+void web_handle_api_value(const boost::cmatch &match, struct mg_connection *conn) {
+//    const struct mg_request_info *request_info = mg_get_request_info(conn);
+
+    std::string sensor(match[1].str());
+    uint64_t timestamp = std::stoul(match[2].str());
+    char buf[1024];
+    int count = mg_read(conn, buf, 1024);
+    std::string value(buf, count);
+
+    leveldb::DB *db = getDB(sensor);
+    if (db == nullptr) {
+        std::cout << "failed to get db for " << sensor << std::endl;
+        mg_printf(conn, "HTTP/1.1 500 Internal Error\r\n\r\n");
+        return;
+    }
+
+    std::cout << "sensor=" << sensor << " key=" << make_key(timestamp) << std::endl;
+    db->Put(leveldb::WriteOptions(), make_key(timestamp), value);
+    mg_printf(conn, "HTTP/1.1 200 Value received\r\n\r\n");
+}
+
+void web_handle_api_range(const boost::cmatch &match, struct mg_connection *conn) {
+    static const leveldb::Comparator *cmp = leveldb::BytewiseComparator();
+
+    std::string sensor(match[1].str());
+    uint64_t start = std::stoul(match[2].str());
+    uint64_t end = std::stoul(match[3].str());
+    std::string key_start(std::move(make_key(start)));
+    std::string key_end(std::move(make_key(end)));
+
+    leveldb::DB *db = getDB(sensor);
+    if (db == nullptr) {
+        mg_printf(conn, "HTTP/1.1 500 Internal Error\r\n\r\n");
+        return;
+    }
+
+    mg_printf(conn,
+            "HTTP/1.1 200 Value received\r\n"
+            "Content-Type: application/json; encoding=UTF-8\r\n"
+            "\r\n");
+
+    std::cout << "sensor=" << sensor << " start=" << start << " end=" << end << std::endl;
+
+    std::ostringstream out;
+    out << "{'sensor':'" << sensor << "', 'error':null, 'data':[";
+    mg_write(conn, out.str().c_str(), out.str().size());
+
+    leveldb::Iterator* it = db->NewIterator(leveldb::ReadOptions());
+    bool first = true;
+    std::ostringstream outbuf;
+    for (it->Seek(key_start); 
+            it->Valid() && cmp->Compare(it->key(), key_end) < 0;
+            it->Next()) {
+        const char *key = it->key().data();
+        size_t key_size =  it->key().size();
+        if (key_size != 20+3) {
+            std::cerr << "invalid key" << std::endl;
+            return;
+        }
+
+        unsigned int offset = 3; // "ts-"
+        // skip zeros in timestamp
+        while (offset < key_size-1 and *(key+offset) == '0')
+            offset++;
+
+        if (first)
+            first = false;
+        else
+            outbuf << ',';
+
+        outbuf << '[';
+        outbuf.write(key+offset, key_size-offset);
+        outbuf << ',';
+        outbuf.write(it->value().data(), it->value().size());
+        outbuf << ']';
+
+        mg_write(conn, outbuf.str().c_str(), outbuf.tellp());
+        outbuf.seekp(0);
+    }
+    mg_printf(conn, "]}\r\n");
+    delete it;
+}
+
diff --git a/datastore-leveldb/src/web.h b/datastore-leveldb/src/web.h
new file mode 100644
index 0000000..1360d3d
--- /dev/null
+++ b/datastore-leveldb/src/web.h
@@ -0,0 +1,18 @@
+#ifndef HAVE_WEB_H
+#define HAVE_WEB_H
+
+extern "C" {
+#include "mongoose.h"
+}
+#ifdef __clang__
+#include <cstddef>
+#warning "Using clang" 
+#define BOOST_NO_CXX11_NUMERIC_LIMITS 
+#endif
+#include <boost/regex.hpp>
+
+void web_handle_api_value(const boost::cmatch &match, struct mg_connection *conn);
+
+void web_handle_api_range(const boost::cmatch &match, struct mg_connection *conn);
+
+#endif/*HAVE_WEB_H*/