本文節選自《Netkiller Java 手札》

5.19.4. 計劃任務控制

matchIfMissing = true， 如果改屬性條目不存在返回 true

@ConditionalOnProperty("batch.metrics.export.influxdb.enabled")
			
# mybean.enabled = true
@ConditionalOnProperty(value='mybean.enabled')
@ConditionalOnProperty(value = "endpoints.hal.enabled", matchIfMissing = true)

# server.host = localhost
@ConditionalOnProperty(name="server.host", havingValue="localhost")
@ConditionalOnExpression("'${server.host}'=='localhost'")

# spring.rabbitmq.dynamic = true
@ConditionalOnProperty(prefix = "spring.rabbitmq", name = "dynamic", matchIfMissing = true)
@ConditionalOnProperty(prefix = "extension.security.cors", name = "enabled", matchIfMissing = false)
@ConditionalOnProperty(prefix = "camunda.bpm.job-execution", name = "enabled", havingValue = "true", matchIfMissing = true)

# spring.social.auto-connection-views = true
@ConditionalOnProperty(prefix = "spring.social.", value = "auto-connection-views")			
 

使用案例

			package mis.schedule;

import java.text.SimpleDateFormat;
import java.util.Date;

import org.slf4j.Logger;
import org.slf4j.LoggerFactory;
import org.springframework.boot.autoconfigure.condition.ConditionalOnProperty;
import org.springframework.scheduling.annotation.Scheduled;
import org.springframework.stereotype.Component;

@ConditionalOnProperty("mis.schedule.enabled")
@Component
public class ScheduledTasks {
	private static final Logger logger = LoggerFactory.getLogger(ScheduledTasks.class);
	private static final SimpleDateFormat dateFormat = new SimpleDateFormat("yyyy-mm-dd HH:mm:ss");
	public final static long ONE_DAY = 24 * 60 * 60 * 1000;
	public final static long ONE_HOUR = 60 * 60 * 1000;
	public final static long ONE_SECOND = 1000;

	public ScheduledTasks() {
		// TODO Auto-generated constructor stub
	}

	@Scheduled(fixedDelay = ONE_SECOND)
	public void scheduleTaskSplitLine() {
		logger.info("==================== {} ====================", dateFormat.format(new Date()));
	}
}			
 

application.properties 配置如下

mis.schedule.enabled=true