the whole shebang

2014-11-25 16:42:40 +01:00
parent 7f74c0613e
commit ab1334c0cf
3686 changed files with 496409 additions and 1 deletions
--- a/vendor/doctrine/dbal/lib/Doctrine/DBAL/Sharding/PoolingShardManager.php
+++ b/vendor/doctrine/dbal/lib/Doctrine/DBAL/Sharding/PoolingShardManager.php
@@ -0,0 +1,132 @@
+<?php
+/*
+ * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
+ * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
+ * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
+ * A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
+ * OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
+ * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
+ * LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
+ * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
+ * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
+ * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
+ * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
+ *
+ * This software consists of voluntary contributions made by many individuals
+ * and is licensed under the MIT license. For more information, see
+ * <http://www.doctrine-project.org>.
+ */
+
+namespace Doctrine\DBAL\Sharding;
+
+/**
+ * Shard Manager for the Connection Pooling Shard Strategy
+ *
+ * @author Benjamin Eberlei <kontakt@beberlei.de>
+ */
+class PoolingShardManager implements ShardManager
+{
+    /**
+     * @var \Doctrine\DBAL\Sharding\PoolingShardConnection
+     */
+    private $conn;
+
+    /**
+     * @var \Doctrine\DBAL\Sharding\ShardChoser\ShardChoser
+     */
+    private $choser;
+
+    /**
+     * @var string|null
+     */
+    private $currentDistributionValue;
+
+    /**
+     * @param \Doctrine\DBAL\Sharding\PoolingShardConnection $conn
+     */
+    public function __construct(PoolingShardConnection $conn)
+    {
+        $params       = $conn->getParams();
+        $this->conn   = $conn;
+        $this->choser = $params['shardChoser'];
+    }
+
+    /**
+     * @return void
+     */
+    public function selectGlobal()
+    {
+        $this->conn->connect(0);
+        $this->currentDistributionValue = null;
+    }
+
+    /**
+     * @param string $distributionValue
+     *
+     * @return void
+     */
+    public function selectShard($distributionValue)
+    {
+        $shardId = $this->choser->pickShard($distributionValue, $this->conn);
+        $this->conn->connect($shardId);
+        $this->currentDistributionValue = $distributionValue;
+    }
+
+    /**
+     * @return string|null
+     */
+    public function getCurrentDistributionValue()
+    {
+        return $this->currentDistributionValue;
+    }
+
+    /**
+     * @return array
+     */
+    public function getShards()
+    {
+        $params = $this->conn->getParams();
+        $shards = array();
+
+        foreach ($params['shards'] as $shard) {
+            $shards[] = array('id' => $shard['id']);
+        }
+
+        return $shards;
+    }
+
+    /**
+     * @param string $sql
+     * @param array  $params
+     * @param array  $types
+     *
+     * @return array
+     *
+     * @throws \RuntimeException
+     */
+    public function queryAll($sql, array $params, array $types)
+    {
+        $shards = $this->getShards();
+        if (!$shards) {
+            throw new \RuntimeException("No shards found.");
+        }
+
+        $result = array();
+        $oldDistribution = $this->getCurrentDistributionValue();
+
+        foreach ($shards as $shard) {
+            $this->selectShard($shard['id']);
+            foreach ($this->conn->fetchAll($sql, $params, $types) as $row) {
+                $result[] = $row;
+            }
+        }
+
+        if ($oldDistribution === null) {
+            $this->selectGlobal();
+        } else {
+            $this->selectShard($oldDistribution);
+        }
+
+        return $result;
+    }
+}