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如何壓縮Web Service數(shù)據(jù)
在現(xiàn)實應(yīng)用中有些時候會有比較大的數(shù)據(jù)對象需要傳輸，或者在一個比較慢的網(wǎng)絡(luò)環(huán)境下發(fā)布調(diào)用web service，此時可以通過壓縮數(shù)據(jù)流的方式來減小數(shù)據(jù)包的大小，從而提高web service的性能。下面yjbys小編為大家準(zhǔn)備了關(guān)于如何壓縮Web Service數(shù)據(jù)的文章，歡迎閱讀。
1. 首先模擬一個可以存放大數(shù)據(jù)的pojo對象，這個對象可以通過構(gòu)造參數(shù)給定的size來模擬一個size大小的字符串。
package com.googlecode.garbagecan.cxfstudy.compress;
public class BigData {
private String name;
private String data;
public BigData() {
}
public BigData(String name, int size) {
this.name = name;
StringBuilder sb = new StringBuilder();
for (int i = 0; i < size; i++) {
sb.append("0");
}
this.data = sb.toString();
}
public String getName() {
return name;
}
public void setName(String name) {
this.name = name;
}
public String getData() {
return data;
}
public void setData(String data) {
this.data = data;
}
}
2. Web Service接口類，和普通的接口定義沒有什么區(qū)別。
package com.googlecode.garbagecan.cxfstudy.compress;
import javax.jws.WebMethod;
import javax.jws.WebParam;
import javax.jws.WebResult;
import javax.jws.WebService;
@WebService
public interface BigDataService {
@WebMethod
@WebResult BigData getBigData(@WebParam String name, @WebParam int size);
}
3. Web Service實現(xiàn)類
package com.googlecode.garbagecan.cxfstudy.compress;
public class BigDataServiceImpl implements BigDataService {
public BigData getBigData(String name, int size) {
BigData bigData = new BigData(name, size);
return bigData;
}
}
4. 測試類，這片文章使用了JUnit測試類來做測試。setUpBeforeClass方法用來啟動Service, testGetBigData方法用來測試web service。
注意setUpBeforeClass方法中的
factoryBean.getInInterceptors().add(new GZIPInInterceptor());
factoryBean.getOutInterceptors().add(new GZIPOutInterceptor());
和testGetBigData方法中的
endpoint.getInInterceptors().add(new GZIPInInterceptor());
endpoint.getOutInterceptors().add(new GZIPOutInterceptor());
上面兩段代碼就是告訴CXF使用壓縮Interceptor來壓縮和解壓縮數(shù)據(jù)包。
package com.googlecode.garbagecan.cxfstudy.compress;
import org.apache.cxf.endpoint.Client;
import org.apache.cxf.endpoint.Endpoint;
import org.apache.cxf.frontend.ClientProxy;
import org.apache.cxf.interceptor.LoggingInInterceptor;
import org.apache.cxf.interceptor.LoggingOutInterceptor;
import org.apache.cxf.jaxws.JaxWsProxyFactoryBean;
import org.apache.cxf.jaxws.JaxWsServerFactoryBean;
import org.apache.cxf.transport.http.gzip.GZIPInInterceptor;
import org.apache.cxf.transport.http.gzip.GZIPOutInterceptor;
import org.junit.Assert;
import org.junit.BeforeClass;
import org.junit.Test;
public class BigDataServiceTest {
private static final String address = "http://localhost:9000/ws/compress/bigDataService";
@BeforeClass
public static void setUpBeforeClass() throws Exception {
JaxWsServerFactoryBean factoryBean = new JaxWsServerFactoryBean();
factoryBean.getInInterceptors().add(new LoggingInInterceptor());
factoryBean.getOutInterceptors().add(new LoggingOutInterceptor());
factoryBean.getInInterceptors().add(new GZIPInInterceptor());
factoryBean.getOutInterceptors().add(new GZIPOutInterceptor());
factoryBean.setServiceClass(BigDataServiceImpl.class);
factoryBean.setAddress(address);
factoryBean.create();
}
@Test
public void testGetBigData() {
JaxWsProxyFactoryBean factoryBean = new JaxWsProxyFactoryBean();
factoryBean.setAddress(address);
factoryBean.setServiceClass(BigDataService.class);
Object obj = factoryBean.create();
Client client = ClientProxy.getClient(obj);
Endpoint endpoint = client.getEndpoint();
endpoint.getInInterceptors().add(new GZIPInInterceptor());
endpoint.getOutInterceptors().add(new GZIPOutInterceptor());
BigDataService service = (BigDataService) obj;
Assert.assertNotNull(service);
String name = "my big data";
int size = 1024 * 1024 * 10;
long start = System.currentTimeMillis();
BigData bigData = service.getBigData(name, size);
long stop = System.currentTimeMillis();
System.out.println("Time: " + (stop - start));
Assert.assertNotNull(bigData);
Assert.assertEquals(name, bigData.getName());
Assert.assertEquals(size, bigData.getData().length());
}
}
5. 運行此unit test，可以在日志中看到數(shù)據(jù)包前后大小和內(nèi)容。
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