Java执行器不在JdbcTemplate上工作
我试图使用executor对象使用jdbcTemplate执行查询,但由于某些原因,程序没有进入jdbcTemplate内部Java执行器不在JdbcTemplate上工作,java,multithreading,jdbctemplate,java.util.concurrent,Java,Multithreading,Jdbctemplate,Java.util.concurrent,我试图使用executor对象使用jdbcTemplate执行查询,但由于某些原因,程序没有进入jdbcTemplate内部 ExecutorService executor = Executors.newFixedThreadPool(NUMBER_OF_CONCURRENT_THREADS); executor.execute(new Runnable() { @Override public void run() {
ExecutorService executor = Executors.newFixedThreadPool(NUMBER_OF_CONCURRENT_THREADS);
executor.execute(new Runnable() {
@Override
public void run() {
inboundJdbcTemplate.query(selectQuery, new RowCallbackHandler() {
@Override
public void processRow(ResultSet rs) throws SQLException {//<-instruction pointer never goes to this line
try {
//buffer.put(buildDataPoint(rs, testPermutationId));
System.out.println(rs.getString(0));
} catch (InterruptedException e) {
e.printStackTrace();
Thread.currentThread().interrupt();
}
}
});
try {
buffer.put(STOPPING_TOKEN);
} catch (InterruptedException e) {
e.printStackTrace();
}
}
}
ExecutorService executor=Executors.newFixedThreadPool(并发线程的数量);
executor.execute(新的Runnable(){
@凌驾
公开募捐{
inboundJdbcTemplate.query(selectQuery,new RowCallbackHandler()){
@凌驾
public void processRow(ResultSet rs)抛出SQLException{/我找到了问题的解决方案
我需要一个CompletionService来确保我知道JdbcTemplate的执行何时完成
{...
ExecutorService executor = Executors.newFixedThreadPool(NUMBER_OF_CONCURRENT_THREADS);
CompletionService<String> completionService = new ExecutorCompletionService (executor);
completionService.submit(new Runnable() {
@Override
public void run() {
inboundJdbcTemplate.query(selectQuery, new RowCallbackHandler() {
@Override
public void processRow(ResultSet rs) throws SQLException {
try {
buffer.put(buildDP(rs, Id));
} catch (InterruptedException e) {
e.printStackTrace();
}
}
}
}, "Success");
try{
Future<String> take1 = completionService.take();
String s = take1.get();
if(!"Success".equals(s)) throw new RuntimeException("Error Occured");
catch (InterruptedException | ExecutionException e) {
LOG.error(" Could not execute DataExtraction",e);}
executor.shutdown();
...}
{。。。
ExecutorService executor=Executors.newFixedThreadPool(并发线程的数量);
CompletionService CompletionService=新的执行者CompletionService(执行者);
completionService.submit(新的Runnable(){
@凌驾
公开募捐{
inboundJdbcTemplate.query(selectQuery,new RowCallbackHandler()){
@凌驾
public void processRow(结果集rs)引发SQLException{
试一试{
put(buildDP(rs,Id));
}捕捉(中断异常e){
e、 printStackTrace();
}
}
}
}"成功";;
试一试{
Future take1=completionService.take();
字符串s=take1.get();
如果(!“Success”.equals)抛出新的运行时异常(“发生错误”);
捕获(中断异常|执行异常e){
LOG.error(“无法执行数据提取”,e);}
executor.shutdown();
...}
如果删除executor部分(仅jdbctemplate部分),我怀疑您的查询不会返回与SQL标准匹配的结果它工作起来很有魅力。我不认为这是问题所在。然后我怀疑你的程序在executor以新线程运行你的代码之前结束。看看调试器,实际上程序进入executor,直到它运行inboundJdbcTemplate,然后它执行的下一行在executor代码之外。