# 1. 依賴樹分析（核心命令）
mvn dependency:tree -Dincludes=com.fasterxml.jackson.core

# 輸出示例：
[INFO] com.example:parent:jar:1.0
[INFO] +- com.example:service:jar:1.0:compile
[INFO] |  \- com.fasterxml.jackson.core:jackson-databind:jar:2.9.9:compile
[INFO] \- com.example:web:jar:1.0:compile
[INFO]    \- com.fasterxml.jackson.core:jackson-databind:jar:2.12.3:compile

<!-- 2. Enforcer插件強(qiáng)制約束 -->
<plugin>
  <groupId>org.apache.maven.plugins</groupId>
  <artifactId>maven-enforcer-plugin</artifactId>
  <version>3.0.0</version>
  <executions>
    <execution>
      <id>enforce-versions</id>
      <goals><goal>enforce</goal></goals>
      <configuration>
        <rules>
          <dependencyConvergence/>
        </rules>
      </configuration>
    </execution>
  </executions>
</plugin>

// 3. 運行時堆棧分析（ClassLoader視角）
public class DependencyDebugger {
  public static void printClassLocation(Class<?> clazz) {
    ProtectionDomain domain = clazz.getProtectionDomain();
    CodeSource source = domain.getCodeSource();
    System.out.println(clazz.getName() + " loaded from: " + source.getLocation());
  }
}

# 清除可能的緩存干擾
mvn clean install -U -T 1C

# -U: 強(qiáng)制更新snapshot依賴
# -T 1C: 每核心線程構(gòu)建一個模塊（避免并行構(gòu)建干擾）

<appender name="LOGSTASH" class="net.logstash.logback.appender.LogstashTcpSocketAppender">
  <destination>logstash:5000</destination>
  <encoder class="net.logstash.logback.encoder.LogstashEncoder">
    <customFields>{"app":"${APP_NAME}","module":"${MODULE_NAME}"}</customFields>
  </encoder>
</appender>

# Logstash pipeline.conf
input {
  tcp {
    port => 5000
    codec => json_lines
  }
}
filter {
  mutate {
    add_field => { 
      "trace_id" => "%{[headers][X-Trace-Id]}" 
    }
  }
}
output {
  elasticsearch {
    hosts => ["elasticsearch:9200"]
    index => "maven-modules-%{+YYYY.MM.dd}"
  }
}

# KQL查詢跨模塊調(diào)用鏈
trace.id: "abc123" and (app: "order-service" OR app: "payment-service")

// 使用MDC實現(xiàn)跨模塊調(diào)用鏈追蹤
public class TracingFilter implements Filter {
  @Override
  public void doFilter(ServletRequest req, ServletResponse res, FilterChain chain) {
    MDC.put("traceId", UUID.randomUUID().toString());
    chain.doFilter(req, res);
  }
}

// 在RPC調(diào)用中傳遞traceId
@FeignClient(name = "inventory-service")
public interface InventoryClient {
  @GetMapping("/stock")
  ResponseEntity<Stock> getStock(
      @RequestHeader("X-Trace-Id") String traceId, 
      @RequestParam Long skuId);
}

# 啟動應(yīng)用時添加調(diào)試參數(shù)
mvn spring-boot:run -Dspring-boot.run.jvmArguments="-agentlib:jdwp=transport=dt_socket,server=y,suspend=n,address=5005"

// 當(dāng)訂單金額>10000時觸發(fā)斷點
if (order.getAmount() > 10000) {
  System.out.println("Debug large order"); // 在此行設(shè)置條件斷點
}

<!-- spring-boot-devtools 配置 -->
<dependency>
  <groupId>org.springframework.boot</groupId>
  <artifactId>spring-boot-devtools</artifactId>
  <optional>true</optional>
</dependency>