major reorg that puts Storage (previously Database) into common

there is now a top-level tests dir, and a compile time switch for
lmdb vs kyotocabinet

1 files changed, 164 insertions, 0 deletions

diff --git a/common/storage_kyoto.cpp b/common/storage_kyoto.cpp
new file mode 100644
index 0000000..05942c2
--- /dev/null
+++ b/common/storage_kyoto.cpp
@@ -0,0 +1,164 @@
+#include "storage.h"
+
+#include <iostream>
+
+#include <QAtomicInt>
+#include <QDebug>
+#include <QDir>
+#include <QFileInfo>
+#include <QReadWriteLock>
+#include <QString>
+#include <QTime>
+
+#include <kchashdb.h>
+
+class Storage::Private
+{
+public:
+    Private(const QString &storageRoot, const QString &name);
+    ~Private();
+
+    kyotocabinet::TreeDB db;
+    bool dbOpen;
+    bool inTransaction;
+};
+
+Storage::Private::Private(const QString &storageRoot, const QString &name)
+    : inTransaction(false)
+{
+    QDir dir;
+    dir.mkdir(storageRoot);
+
+    //create file
+    dbOpen = db.open((storageRoot + "/" + name + ".kch").toStdString(), kyotocabinet::BasicDB::OWRITER | kyotocabinet::BasicDB::OCREATE);
+    if (!dbOpen) {
+        // TODO: handle error
+    }
+}
+
+Storage::Private::~Private()
+{
+    if (dbOpen && inTransaction) {
+        db.end_transaction(false);
+    }
+}
+
+Storage::Storage(const QString &storageRoot, const QString &name)
+    : d(new Private(storageRoot, name))
+{
+}
+
+Storage::~Storage()
+{
+    delete d;
+}
+
+bool Storage::isInTransaction() const
+{
+    return d->inTransaction;
+}
+
+bool Storage::startTransaction(TransactionType type)
+{
+    if (!d->dbOpen) {
+        return false;
+    }
+
+    if (d->inTransaction) {
+        return true;
+    }
+
+    //TODO handle errors
+    d->inTransaction = d->db.begin_transaction();
+    return d->inTransaction;
+}
+
+bool Storage::commitTransaction()
+{
+    if (!d->dbOpen) {
+        return false;
+    }
+
+    if (!d->inTransaction) {
+        return false;
+    }
+
+    bool success = d->db.end_transaction(true);
+    d->inTransaction = false;
+    return success;
+}
+
+void Storage::abortTransaction()
+{
+    if (!d->dbOpen || !d->inTransaction) {
+        return;
+    }
+
+    d->db.end_transaction(false);
+    d->inTransaction = false;
+}
+
+bool Storage::write(const char *key, size_t keySize, const char *value, size_t valueSize)
+{
+    if (!d->dbOpen) {
+        return false;
+    }
+
+    bool success = d->db.set(key, keySize, value, valueSize);
+    return success; 
+}
+
+bool Storage::write(const std::string &sKey, const std::string &sValue)
+{
+    if (!d->dbOpen) {
+        return false;
+    }
+
+    bool success = d->db.set(sKey, sValue);
+    return success; 
+}
+
+void Storage::read(const std::string &sKey, const std::function<void(const std::string &value)> &resultHandler)
+{
+    if (!d->dbOpen) {
+        return;
+    }
+
+    std::string value;
+    if (d->db.get(sKey, &value)) {
+        resultHandler(value);
+    }
+}
+
+void Storage::read(const std::string &sKey, const std::function<void(void *ptr, int size)> &resultHandler)
+{
+    if (!d->dbOpen) {
+        return;
+    }
+
+    size_t valueSize;
+    char *valueBuffer = d->db.get(sKey.data(), sKey.size(), &valueSize);
+    resultHandler(valueBuffer, valueSize);
+    delete[] valueBuffer;
+}
+
+qint64 Storage::diskUsage() const
+{
+    if (!d->dbOpen) {
+        return 0;
+    }
+
+    QFileInfo info(QString::fromStdString(d->db.path()));
+    return info.size();
+}
+
+void Storage::removeFromDisk() const
+{
+    if (!d->dbOpen) {
+        return;
+    }
+
+   QFileInfo info(QString::fromStdString(d->db.path()));
+   QDir dir = info.dir();
+   dir.remove(info.fileName());
+}