leveldb: split up in 3 files

1 files changed, 12 insertions, 158 deletions

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;
 }