我在 Xpage 上编写了一个自定义的 rest 服务,它与一个 bean 相关联。 Xpage 是:
<xe:restService
id="restServiceCustom"
pathInfo="custom"
ignoreRequestParams="false"
state="false"
preventDojoStore="true">
<xe:this.service>
<xe:customRestService
contentType="application/json"
serviceBean="XXXX.PCServiceBean">
</xe:customRestService>
</xe:this.service>
</xe:restService>
我从网上一些优秀的帖子中拼凑了我的 java 代理。我刚刚开始使用 GET。我的代码运行但我看起来很慢(在我的开发服务器上)。我想让它尽可能快。我正在使用 ViewEntryCollection,并且我正在“刷新”我认为正在流式传输的每条记录。
我在代码中添加了自己的“[”,所以我认为我做的不对,因为我从未见过任何其他人这样做的例子。
任何建议将不胜感激。
package com.XXXXX.bean;
import java.io.IOException;
import java.io.Writer;
import java.util.Vector;
import javax.servlet.http.HttpServletRequest;
import javax.servlet.http.HttpServletResponse;
import org.openntf.domino.Database;
import org.openntf.domino.Session;
import org.openntf.domino.View;
import org.openntf.domino.ViewEntry;
import org.openntf.domino.ViewEntryCollection;
import org.openntf.domino.utils.Factory;
import com.ibm.commons.util.io.json.JsonException;
import com.ibm.commons.util.io.json.util.JsonWriter;
import com.ibm.domino.services.ServiceException;
import com.ibm.domino.services.rest.RestServiceEngine;
import com.ibm.xsp.extlib.component.rest.CustomService;
import com.ibm.xsp.extlib.component.rest.CustomServiceBean;
public class PCServiceBean extends CustomServiceBean {
@Override
public void renderService(CustomService service, RestServiceEngine engine) throws ServiceException {
try {
HttpServletRequest request = engine.getHttpRequest();
HttpServletResponse response = engine.getHttpResponse();
response.setHeader("Content-Type", "application/json; charset=UTF-8");
String method = request.getMethod();
if (method.equals("GET")) {
this.doGet(request, response);
} else if (method.equals("POST")) {
this.doPost(request, response);
} else if (method.equals("PUT")) {
this.doPut(request, response);
} else if (method.equals("DELETE")) {
this.doDelete(request, response);
}
} catch (Exception e) {
throw new RuntimeException(e);
}
}
private void doDelete(HttpServletRequest request, HttpServletResponse response) {
// TODO Auto-generated method stub
}
private void doPut(HttpServletRequest request, HttpServletResponse response) {
// TODO Auto-generated method stub
}
private void doPost(HttpServletRequest request, HttpServletResponse response) {
// TODO Auto-generated method stub
}
private void doGet(HttpServletRequest request, HttpServletResponse response) throws IOException, JsonException {
Session session = Factory.getSession();
Database DB = session.getDatabase(session.getCurrentDatabase().getServer(), "scoApps\\PC\\PCData.nsf");
View pcView = DB.getView("viewAllByStatus");
int i = 1;
Writer out = response.getWriter();
JsonWriter writer = new JsonWriter(out, false);
writer.out("[");
ViewEntryCollection vec = pcView.getAllEntries();
int count = vec.getCount();
for (ViewEntry entry : vec) {
Vector<?> columnValues = entry.getColumnValues();
writer.startObject();
writer.startProperty("unid");
writer.outStringLiteral(String.valueOf(columnValues.get(1)));
writer.endProperty();
writer.startProperty("status");
writer.outStringLiteral(String.valueOf(columnValues.get(0)));
writer.endProperty();
writer.startProperty("assetTag");
writer.outStringLiteral(String.valueOf(columnValues.get(2)));
writer.endProperty();
writer.startProperty("serialNumber");
writer.outStringLiteral(String.valueOf(columnValues.get(3)));
writer.endProperty();
writer.startProperty("model");
writer.outStringLiteral(String.valueOf(columnValues.get(4)));
writer.endProperty();
writer.startProperty("currentLocation");
writer.outStringLiteral(String.valueOf(columnValues.get(5)));
writer.endProperty();
writer.endObject();
if (i != count) {
i = i + 1;
writer.out(",");
writer.flush();
}
}
writer.out("]");
writer.flush();
}
}
最佳答案
将您的代码更改为
JsonWriter writer = new JsonWriter(out, false);
writer.startArray();
ViewEntryCollection vec = pcView.getAllEntries();
int count = vec.getCount();
for (ViewEntry entry : vec) {
Vector<?> columnValues = entry.getColumnValues();
writer.startArrayItem();
writer.startObject();
writer.startProperty("unid");
writer.outStringLiteral(String.valueOf(columnValues.get(1)));
writer.endProperty();
...
writer.endObject();
writer.endArrayItem();
}
writer.endArray();
writer.flush();
它使用JsonWriter的
- startArray() 和 endArray() 代替 out("[") 和 out("]")
- startArrayItem() 和 endArrayItem() 代替 out(",") 和 flush()
如果将 JsonWriter 的 compact 选项设置为 true,则 JSON 响应字符串会变短:
JsonWriter writer = new JsonWriter(out, true);
关于xpages - 使用 bean 在 customRestService 中返回 View 的最快方法,我们在Stack Overflow上找到一个类似的问题: https://stackoverflow.com/questions/40246265/