实现基于BDB的日志存储 (sofastack#752)

* 实现基于BDB的日志存储

* bdb代码优化

1、去掉注释代码
2、日志
3、SPI 优先级 = 1

jraft-extension/bdb-log-storage-impl/pom.xml

@@ -0,0 +1,31 @@
+<?xml version="1.0" encoding="UTF-8"?>
+<project xmlns="http://maven.apache.org/POM/4.0.0" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xsi:schemaLocation="http://maven.apache.org/POM/4.0.0 http://maven.apache.org/xsd/maven-4.0.0.xsd">
+    <modelVersion>4.0.0</modelVersion>
+    <parent>
+        <artifactId>jraft-extension</artifactId>
+        <groupId>com.alipay.sofa</groupId>
+        <version>1.3.9</version>
+    </parent>
+    <artifactId>bdb-log-storage-impl</artifactId>
+    <name>bdb-log-storage-impl</name>
+    <url>http://maven.apache.org</url>
+    <properties>
+        <project.build.sourceEncoding>UTF-8</project.build.sourceEncoding>
+    </properties>
+    <dependencies>
+        <dependency>
+            <groupId>${project.groupId}</groupId>
+            <artifactId>jraft-core</artifactId>
+        </dependency>
+        <dependency>
+            <groupId>com.sleepycat</groupId>
+            <artifactId>je</artifactId>
+            <version>18.3.12</version>
+        </dependency>
+        <dependency>
+            <groupId>junit</groupId>
+            <artifactId>junit</artifactId>
+            <scope>test</scope>
+        </dependency>
+    </dependencies>
+</project>

jraft-extension/bdb-log-storage-impl/src/main/java/com/alipay/sofa/jraft/core/BDBLogStorageJRaftServiceFactory.java

@@ -0,0 +1,37 @@
+/*
+ * Licensed to the Apache Software Foundation (ASF) under one or more
+ * contributor license agreements.  See the NOTICE file distributed with
+ * this work for additional information regarding copyright ownership.
+ * The ASF licenses this file to You under the Apache License, Version 2.0
+ * (the "License"); you may not use this file except in compliance with
+ * the License.  You may obtain a copy of the License at
+ *
+ *     http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+package com.alipay.sofa.jraft.core;
+
+import com.alipay.sofa.jraft.core.DefaultJRaftServiceFactory;
+import com.alipay.sofa.jraft.option.RaftOptions;
+import com.alipay.sofa.jraft.storage.LogStorage;
+import com.alipay.sofa.jraft.storage.impl.BDBLogStorage;
+import com.alipay.sofa.jraft.util.SPI;
+
+/**
+ * override createLogStorage
+ * @author cff
+ *
+ */
+@SPI(priority = 1)
+public class BDBLogStorageJRaftServiceFactory extends DefaultJRaftServiceFactory {
+
+    @Override
+    public LogStorage createLogStorage(String uri, RaftOptions raftOptions) {
+        return new BDBLogStorage(uri, raftOptions);
+    }
+}