Add AWS DynamoDB handler

This also adds the `aws/aws-sdk-php` dev dependency

src/Monolog/Handler/DynamoDbHandler.php

@@ -0,0 +1,85 @@
+<?php
+
+/*
+ * This file is part of the Monolog package.
+ *
+ * (c) Jordi Boggiano <j.boggiano@seld.be>
+ *
+ * For the full copyright and license information, please view the LICENSE
+ * file that was distributed with this source code.
+ */
+
+namespace Monolog\Handler;
+
+use Aws\DynamoDb\DynamoDbClient;
+use Monolog\Formatter\ScalarFormatter;
+use Monolog\Handler\AbstractProcessingHandler;
+use Monolog\Logger;
+
+/**
+ * Amazon DynamoDB handler (http://aws.amazon.com/dynamodb/)
+ *
+ * @link https://github.com/aws/aws-sdk-php/
+ * @author Andrew Lawson <adlawson@gmail.com>
+ */
+class DynamoDbHandler extends AbstractProcessingHandler
+{
+    const DATE_FORMAT = 'Y-m-d\TH:i:s.uO';
+
+    /**
+     * @var DynamoDbClient
+     */
+    protected $client;
+
+    /**
+     * @var string
+     */
+    protected $table;
+
+    /**
+     * @param DynamoDbClient $client
+     * @param string $table
+     * @param integer $level
+     * @param boolean $bubble
+     */
+    public function __construct(DynamoDbClient $client, $table, $level = Logger::DEBUG, $bubble = true)
+    {
+        $this->client = $client;
+        $this->table = $table;
+
+        parent::__construct($level, $bubble);
+    }
+
+    /**
+     * {@inheritdoc}
+     */
+    protected function write(array $record)
+    {
+        $filtered = $this->filterEmptyFields($record['formatted']);
+        $formatted = $this->client->formatAttributes($filtered);
+
+        $this->client->putItem(array(
+            'TableName' => $this->table,
+            'Item' => $formatted
+        ));
+    }
+
+    /**
+     * @param array $record
+     * @return array
+     */
+    protected function filterEmptyFields(array $record)
+    {
+        return array_filter($record, function($value) {
+            return !empty($value) || false === $value || 0 === $value;
+        });
+    }
+
+    /**
+     * {@inheritdoc}
+     */
+    protected function getDefaultFormatter()
+    {
+        return new ScalarFormatter(self::DATE_FORMAT);
+    }
+}