多线程如何启动在java中按顺序运行的三个任务?
我正在尝试启动三项任务:第一项任务将阅读一些电子邮件,完成后将启动一项基于这些电子邮件生成一些图形的服务,最后这些图形将作为电子邮件上的zip文件发送。 这些任务必须按以下精确顺序运行:
dataReader->;图形发生器->;邮件发送者
我实现了这个服务,但我不明白为什么它不起作用
@Component
public class WeeklyEmailService {
@Autowired
private EmailSender emailSender;
@Autowired
private GraphGenerator graphGenerator;
@Autowired
private DataReader dataReader;
@Autowired
private CompanyRepository companyRepository;
@Autowired
private EmailConfigurer emailConfigurer;
@Value("${mail.username}")
private String username;
@Value("${mail.password}")
private String password;
public void sendWeeklyEmail() {
emailConfigurer.setUsername(username);
emailConfigurer.setPassword(password);
if (emailConfigurer.configure() != null) {
System.out.println("Connection successfully established with mail server!");
}
Task<Void> reader = new Task<Void>() {
@Override
protected Void call() throws Exception {
dataReader.readWeeklyEmails();
return null;
}
};
Task<Void> generator = new Task<Void>() {
@Override
protected Void call() throws Exception {
companyRepository.getCompanyNames().forEach(company -> {
graphGenerator.generateGraphs(new DateTime().minusWeeks(1), new DateTime(), company);
});
return null;
}
};
Task<Void> emailTask = new Task<Void>() {
@Override
protected Void call() throws Exception {
emailSender.sendMailWithAttachment();
return null;
}
};
reader.setOnSucceeded(event -> {
Thread generatorThread = new Thread(generator);
generatorThread.start();
});
generator.setOnSucceeded(event -> {
Thread emailThread = new Thread(emailTask);
emailThread.start();
});
emailTask.setOnSucceeded(event -> {
if (clean()) {
System.out.println("Graphs Reports and ZIP files deleted from your computer");
} else {
System.out.println("Files which you want to delete do not exists");
}
});
Thread readerThread = new Thread(reader);
readerThread.start();
}
private boolean clean() {
boolean cleaned = false;
try {
cleaned = Files.deleteIfExists(Paths.get("graphs"));
cleaned = Files.deleteIfExists(Paths.get("reports"));
cleaned = Files.deleteIfExists(Paths.get("zip"));
} catch (IOException e) {
e.printStackTrace();
}
return cleaned;
}
}
如果有更好的方法,请告诉我,谢谢
共 (0) 个答案