//数据库事务配置
@Autowired
private DataSource dataSource;
@Bean
public DataSourceTransactionManager dataSourceTransactionManager() {
DataSourceTransactionManager transactionManager = new DataSourceTransactionManager();
transactionManager.setDataSource(dataSource);
return transactionManager;
}
@Bean
public TransactionTemplate transactionTemplate(DataSourceTransactionManager dataSourceTransactionManager) {
TransactionTemplate transactionTemplate = new TransactionTemplate(dataSourceTransactionManager);
transactionTemplate.setPropagationBehavior(TransactionDefinition.PROPAGATION_REQUIRED);
transactionTemplate.setIsolationLevel(TransactionDefinition.ISOLATION_DEFAULT);
return transactionTemplate;
}
public boolean result() {
return template.execute(action -> {
try {
int result = userMapper.insert(new User());
if (result == 1) {
action.setRollbackOnly();
return false;
} else {
return true;
}
} catch (Exception e) {
action.setRollbackOnly();
}
return false;
});
}
https://blog.csdn.net/qq_33404395/article/details/83377382
https://dylanxu.iteye.com/blog/1403038
https://blog.csdn.net/a83370892/article/details/66476623
正则匹配
https://www.cnblogs.com/fozero/p/7868687.html http://tool.oschina.net/uploads/apidocs/jquery/regexp.html
select * from user_control uc where length(uc.user_kind)>2 and id in (select us.user_id from user_statistics us);
@Override public void afterPropertiesSet() throws Exception { Connection connection = factory.createConnection(); channel = connection.createChannel(false); channel.queueBind("gateway.cmpp.deliver", "sms.callback", "gateway.cmpp.deliver"); }
@RabbitHandler public void process(JSONObject msg, @Header(AmqpHeaders.DELIVERY_TAG) long deliveryTag, Channel channel) { try {
channel.basicAck(deliveryTag, true);
}
} catch (Exception e) {
xxxx;
}
}
System.out.println(JSON.parse(JSON.toJSON(str).toString()));
JSONObject msg = JSON.parseObject(str);
#mongo读写分离
replicaSet=sioo&readPreference=secondaryPreferred
@RunWith(SpringRunner.class) @SpringBootTest(classes = DemoApplication.class) public class MockTest {
private MockMvc mockMvc;
@Autowired
private WebApplicationContext context;
@Before
public void setUp() {
mockMvc = MockMvcBuilders.webAppContextSetup(context).build();
}
@Test
public void TestAAA() throws Exception {
mockMvc.perform(MockMvcRequestBuilders.get("/mongo/test"))
.andExpect(MockMvcResultMatchers.status().isOk())
.andExpect(MockMvcResultMatchers.content().string("Mock test"));
}
}
linux同步 系统/网络时间 ntpdate cn.pool.ntp.org
//cmpp模拟网关 http://www.simpleteam.com/doku.php?do=export_xhtml&id=message:cmpp_simulator
netstat -anp|grep 9217
ps -ef|grep cpu|grep -v grep|awk '{print $2}'
1、ps -ef 显示所有的进程，其中后面的e是显示结果的意思，f是显示完整格式，其他比如-w是不限制列宽显示，具体可见ps --help all
2、ps -ef|grep cpu作用是把包括cpu这个关键字的进程都显示出来
3、如2.1所示，ps -ef|grep cpu会把grep cpu的进程也统计进来，因此用ps -ef|grep cpu|grep -v grep去除grep进程
4、最后，只包含cpu关键字的进程筛选结果作为输入给awk '{print $2}'，这个部分的作用是提取输入的第二列，而第二列正是进程的PID
//mongo通配符索引 db.example.createIndex({ "attributes.$**": 1 }); mongo 升级 下载4.2.1 包
db.adminCommand( { getParameter: 1, featureCompatibilityVersion: 1 } )
db.adminCommand( { setFeatureCompatibilityVersion: "4.2" } )
http://downloads.mongodb.org/linux/mongodb-linux-x86_64-rhel70-4.2.1.tgz
https://docs.mongodb.com/manual/release-notes/4.2-upgrade-standalone/
https://blog.csdn.net/u____/article/details/79859503
//mongodb索引
db.collection.createIndex( { "$**" : 1 }, { "wildcardProjection" : { "fieldA" : 0, "fieldB.fieldC" : 0 } } )
// maven 删除依赖
org.apache.maven maven-embedder 2.0 org.apache.maven maven-core ...<dependency>
<groupId>org.springframework.data</groupId>
<artifactId>spring-data-mongodb</artifactId>
<exclusions>
<exclusion>
<groupId>*</groupId>
<artifactId>*</artifactId>
</exclusion>
</exclusions>
</dependency>
配置jmc元成功访问
-Dcom.sun.management.jmxremote.port=7001 -Dcom.sun.management.jmxremote -Dcom.sun.management.jmxremote.authenticate=false -Dcom.sun.management.jmxremote.ssl=false -Djava.rmi.server.hostname=your ip
@PostConstruct
public void createDelayQueue() {
//新建exchange
Exchange exchange = ExchangeBuilder.directExchange(MsgSendQueue.EXCHANGE_NAME).durable(true).build();
rabbitAdmin.declareExchange(exchange);
//新建queue
Queue queue = QueueBuilder.durable(MsgSendQueue.SEND_PACKAGE_DELAY.getQueueName()).withArgument("x-dead-letter-exchange", MsgSendQueue.EXCHANGE_NAME)
.withArgument("x-dead-letter-routing-key", MsgSendQueue.SEND_PACKAGE_NORMAL.getQueueName())
.withArgument("x-message-ttl", 60000)
.build();
rabbitAdmin.declareQueue(queue);
//绑定
rabbitAdmin.declareBinding(BindingBuilder.bind(queue).to(exchange).with(MsgSendQueue.SEND_PACKAGE_DELAY.getQueueName()).noargs());
}
expireAfterAccess: 当缓存项在指定的时间段内没有被读或写就会被回收。
expireAfterWrite：当缓存项在指定的时间段内没有更新就会被回收。
refreshAfterWrite：当缓存项上一次更新操作之后的多久会被刷新。
//java开启远程调试
java -Xdebug -Xrunjdwp:server=y,transport=dt_socket,address=8000,suspend=n
-jar target/myapplication-0.0.1-SNAPSHOT.jar
java -jar -Xms3584m -Xmx3584m -Xss512k -XX:MaxDirectMemorySize=192M /webapps/app.jar
java 8
为什么 Lambda 表达式(匿名类) 不能访问非 final 的局部变量呢？ 因为实例变量存在堆中，而局部变量是在栈上分配，Lambda 表达(匿名类) 会在另一个线程中执行。 如果在线程中要直接访问一个局部变量，可能线程执行时该局部变量已经被销毁了， 而 final 类型的局部变量在 Lambda 表达式(匿名类) 中其实是局部变量的一个拷贝。
// 并发编程网 好多有用的东西 http://ifeve.com/
package examples;
public class ExampleBean {
// Fields omitted
@ConstructorProperties({"years", "ultimateAnswer"})
public ExampleBean(int years, String ultimateAnswer) {
this.years = years;
this.ultimateAnswer = ultimateAnswer;
}
}
//nohup 不生成nohup.out
nohup java -jar /xxx/xxx/xxx.jar >/dev/null 2>&1 & https://www.cnblogs.com/wangsongbai/p/10215155.html
//springboot 日志设置
logging: file: /data/logs/sioo-deliver/sioo-deliver.log file.max-history: 2 file.max-size: 100MB level: root: info com: sioo: info
maven -B -f /var/lib/jenkins/workspace/tenant-web-dev/pom.xml -U -Dmaven.test.skip=true -Dmaven.javadoc.skip=true install
//home @Configuration @EnableWebMvc public class WebConfig implements WebMvcConfigurer {
@Override
public void addViewControllers(ViewControllerRegistry registry) {
registry.addViewController("/").setViewName("home");
}
}
https://segmentfault.com/a/1190000004315890
//mybatis 不使用驼峰
**property name="useActualColumnNames" value="true"
//thymleaf replace fragment insert https://blog.csdn.net/wangmx1993328/article/details/84747497
处理异常信息 https://blog.csdn.net/jaryle/article/details/90378637
mysql连接时区问题 jdbc:mysql://localhost:3306/test?useUnicode=true&characterEncoding=UTF-8&serverTimezone=Asia/Shanghai&useSSL=false
jdbc:mysql://localhost:3306/test?useUnicode=true&characterEncoding=UTF-8&serverTimezone=GMT%2B8&useSSL=false
spring cloud hystrix https://www.cnblogs.com/duan2/p/9307217.html
**linux mount disk **
//列出 所有设备 lsblk
//显示所有的磁盘信息 fdisk -l
//格式化 磁盘 mkfs -t ext4 -c /dev/sdb
//格式化 磁盘 mkfs.ext4 /dev/sdb
dmsetup status dmsetup remove_all
echo "/dev/sdb /data ext4 defaults 0 0">>/etc/fstab
--
远程debugger
java -Xdebug -Xrunjdwp:server=y,transport=dt_socket,address=8000,suspend=n
-jar target/myapplication-0.0.1-SNAPSHOT.jar
//maven 下载source 文档
mvn dependency:sources //修复 ntfs, i是符 chkdsk i: /f
{allowDiskUse: true}