Apache Camel：条件化设置请求头、请求体并安全使用toD()动态路由

// MyCompositePojo.java
public class MyCompositePojo {
    private String token;
    private HttpMethod httpMethod; // Enum: POST, PUT, DELETE, GET, etc.
    private NewEvent newEvent; // POJO representing the payload
    private ConfigDetail configDetail; // POJO with URL and other config

    // Getters and Setters
    public String getToken() { return token; }
    public void setToken(String token) { this.token = token; }
    public HttpMethod getHttpMethod() { return httpMethod; }
    public void setHttpMethod(HttpMethod httpMethod) { this.httpMethod = httpMethod; }
    public NewEvent getNewEvent() { return newEvent; }
    public void setNewEvent(NewEvent newEvent) { this.newEvent = newEvent; }
    public ConfigDetail getConfigDetail() { return configDetail; }
    public void setConfigDetail(ConfigDetail configDetail) { this.configDetail = configDetail; }

    public enum HttpMethod { POST, PUT, DELETE, GET }
}

// NewEvent.java
public class NewEvent {
    private String number;
    private String someField;
    private String operationId;

    // Getters and Setters
    public String getNumber() { return number; }
    public void setNumber(String number) { this.number = number; }
    public String getSomeField() { return someField; }
    public void setSomeField(String someField) { this.someField = someField; }
    public String getOperationId() { return operationId; }
    public void setOperationId(String operationId) { this.operationId = operationId; }
}

// ConfigDetail.java
public class ConfigDetail {
    private String url;
    private HttpConfig http;

    // Getters and Setters
    public String getUrl() { return url; }
    public void setUrl(String url) { this.url = url; }
    public HttpConfig getHttp() { return http; }
    public void setHttp(HttpConfig http) { this.http = http; }
}

// HttpConfig.java
public class HttpConfig {
    private boolean deleteSomeField;

    // Getters and Setters
    public boolean isDeleteSomeField() { return deleteSomeField; }
    public void setDeleteSomeField(boolean deleteSomeField) { this.deleteSomeField = deleteSomeField; }
}

import org.apache.camel.Exchange;
import org.apache.camel.Message;
import org.apache.camel.Processor;
import org.apache.camel.component.http.HttpMethods; // For Exchange.HTTP_METHOD
import org.apache.camel.http.common.HttpHeaders; // For HttpHeaders.CONTENT_TYPE
import com.fasterxml.jackson.databind.ObjectMapper; // Example for JSON marshalling

import javax.ws.rs.core.MediaType;
import java.util.Arrays;

public class MyCustomHttpPreparerProcessor implements Processor {

    private final ObjectMapper objectMapper = new ObjectMapper(); // Re-use ObjectMapper

    @Override
    public void process(Exchange exchange) throws Exception {
        // 1. 获取原始的MyCompositePojo
        MyCompositePojo compositePojo = exchange.getIn().getBody(MyCompositePojo.class);
        Message in = exchange.getIn();

        // 确保获取到了复合POJO
        if (compositePojo == null) {
            throw new IllegalArgumentException("Exchange body is not MyCompositePojo or is null.");
        }

        // 2. 设置通用的HTTP请求头
        in.setHeader("Authorization", "Bearer " + compositePojo.getToken());
        in.setHeader(Exchange.HTTP_METHOD, compositePojo.getHttpMethod().name());

        String httpMethodName = compositePojo.getHttpMethod().name();

        // 3. 根据HTTP方法条件化设置HTTP_PATH
        if (Arrays.asList("PUT", "DELETE").contains(httpMethodName))