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OrderController.java
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OrderController.java
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package com.zachelrath.springboot.structuredloggingdemo;
// Import log4j classes.
import org.apache.logging.log4j.CloseableThreadContext;
import org.apache.logging.log4j.LogManager;
import org.apache.logging.log4j.Logger;
import org.apache.logging.log4j.core.config.plugins.validation.constraints.Required;
import org.apache.logging.log4j.message.ObjectMessage;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.web.bind.annotation.*;
import java.util.List;
import java.util.Map;
@RestController
public class OrderController {
private static final Logger logger = LogManager.getLogger(OrderController.class);
private Database d;
@Autowired
public OrderController(Database database) {
this.d = database;
}
@RequestMapping(
value = "/order/{retailer}/{orderNumber}/items",
method = RequestMethod.GET,
produces = "application/json"
)
@ResponseBody
public List<OrderItem> getOrderItems(
@PathVariable("orderNumber") @Required String orderNumber,
@PathVariable("retailer") @Required String retailer) {
try (final CloseableThreadContext.Instance ignored = CloseableThreadContext
.put("orderNumber", orderNumber)
.put("retailer", retailer)) {
logger.info("Getting items");
List<OrderItem> orderItems = null;
try {
orderItems = d.getItemsForOrder(orderNumber);
} catch (Exception ex) {
logger.error("Unable to fetch items from database for order", ex);
throw ex;
}
// Log using an inline map:
logger.info(new ObjectMessage(Map.of(
"totalItems", orderItems.size(),
"items", orderItems)));
// Log using a custom wrapper class (same result):
// logger.info(new ObjectMessage(new ItemLog(orderItems)));
return orderItems;
}
}
}