
org.fastquery.service.GenerateRepositoryImpl Maven / Gradle / Ivy
/*
* Copyright (c) 2016-2017, fastquery.org and/or its affiliates. All rights reserved.
*
* 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.
*
* For more information, please see http://www.fastquery.org/.
*
*/
package org.fastquery.service;
import java.io.File;
import java.io.FileOutputStream;
import java.util.ArrayList;
import java.util.List;
import java.util.Set;
import org.apache.log4j.Logger;
import org.apache.velocity.app.Velocity;
import org.fastquery.asm.AsmRepository;
import org.fastquery.core.GenerateRepository;
import org.fastquery.core.Repository;
import org.fastquery.core.Resource;
import org.fastquery.dsm.FastQueryJson;
import org.fastquery.mapper.QueryPool;
import org.fastquery.util.ClassUtil;
import org.fastquery.util.FastQueryJSONObject;
import org.fastquery.util.LoadPrperties;
/**
* 这个类在osgi环境中不能调用
* @author xixifeng ([email protected])
*/
class GenerateRepositoryImpl implements GenerateRepository {
private static final Logger LOG = Logger.getLogger(GenerateRepositoryImpl.class);
private static GenerateRepositoryImpl instance;
private GenerateRepositoryImpl() {
LOG.debug("GenerateRepositoryImpl 已实例化.");
Resource resource = new FQueryResourceImpl();
// 1). 装载配置文件
Set fqPropertie = LoadPrperties.load(resource);
// 2). 初始化velocity
String fdir = FastQueryJSONObject.getVelocity();
if(fdir!=null) {
File velocity = new File(fdir);
if( velocity.exists() && velocity.isFile()) {
Velocity.init(FastQueryJSONObject.getVelocity());
} else {
LOG.info("fastquery.json中的velocity属性指定的文件地址不存在.那行配置不是必须的,请注意:不要重复配置!");
}
}
List> clses = new ArrayList<>();
// 3). 批量生成 Repository 的实现类
Set basePackages = null;
for (FastQueryJson fQueryPropertie : fqPropertie) {
basePackages = fQueryPropertie.getBasePackages();
for (String basePackage : basePackages) {
List> classes = ClassUtil.getClasses(basePackage);
clses.addAll(classes);
// classes.forEach(this::generate)
for (Class rcls : classes) {
generate(rcls); // 生成
QueryPool.put(rcls.getName(), resource);
}
}
}
// 3). 生成 Repository之后的检测
AsmRepository.after(clses);
}
static GenerateRepositoryImpl getInstance() {
if (instance == null) {
// 如果在这儿, 可能有两个线程进入了
synchronized (GenerateRepositoryImpl.class) {
if (instance == null) { // 这步不能省!
instance = new GenerateRepositoryImpl();
}
}
}
return instance;
}
@SuppressWarnings("unchecked")
@Override
public T generate(Class repositoryClazz) {
String name = repositoryClazz.getName()+ SUFFIX;
if( FqClassLoader.findLoadedClassByName(name) == null ) {
byte[] bytes = AsmRepository.generateBytes(repositoryClazz);
// 把生成的文件存储起来
try(FileOutputStream fos = new FileOutputStream("/data/tmp/"+name+".class")) {
fos.write(bytes);
} catch (Exception e) {
// TODO: handle exception
}
// 把生成的文件存储起来 end
return (T) new FqClassLoader(this.getClass().getClassLoader()).defineClassByName(name, bytes, 0, bytes.length);
}
return null;
}
@SuppressWarnings("unchecked")
@Override
public T getProxyRepository(Class clazz) {
return (T) FqClassLoader.findLoadedClassByName(clazz.getName() + SUFFIX);
}
}
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