セッションをredisに保存する簡単な実装

負荷等化の場合,ユーザが異なる機器にアクセスし,セッション同期を行わなければユーザが提案されるため,ユーザ体験が非常に悪いため,セッション同期を行う必要が遠く,セッションをreidsキャッシュサーバに置くことで問題をうまく解決できる.次はコードの簡単な実装です.
一、webを配置する.xmlフィルタ:

		sessionFilter
		org.springframework.web.filter.DelegatingFilterProxy
	
	
	
		sessionFilter
		/*
	

二、対応するフィルタ名を配置する:

三、
SessionFilterの実装:

public class SessionFilter extends GenericFilterBean {

	private RedisTemplate redisTemplate;
	@Override
	public void doFilter(ServletRequest request, ServletResponse response,
			FilterChain chain) throws IOException, ServletException {
		System.out.println("filter");
		HttpServletRequest re = (HttpServletRequest)request;
		HttpServletResponse res = (HttpServletResponse)response;
		TerryHttpServletRequestWrapper wrapper = new TerryHttpServletRequestWrapper(re,res,redisTemplate);
		chain.doFilter(wrapper, response);
	}
	public RedisTemplate getRedisTemplate() {
		return redisTemplate;
	}
	public void setRedisTemplate(RedisTemplate redisTemplate) {
		this.redisTemplate = redisTemplate;
	}
}

四、
TerryHttpServiceRequestWrapperの実装:

public class TerryHttpServletRequestWrapper extends HttpServletRequestWrapper {

	private CacheHttpSession session;
	private HttpServletResponse response;
	private RedisTemplate redisTemplate;
	public TerryHttpServletRequestWrapper(HttpServletRequest request, HttpServletResponse response,RedisTemplate redisTemplate) {
		super(request);
		this.response = response;
		this.redisTemplate = redisTemplate;
	}

	@Override
	public HttpSession getSession(boolean create) {
		if(session != null) {
			return session;
		}
		String sid = "terry" + System.currentTimeMillis();
		writeSidToCookie(sid);
		session = new CacheHttpSession(null,sid,redisTemplate);
		return session;
	}

	@Override
	public HttpSession getSession() {
		return getSession(false);
	}
	protected void writeSidToCookie(String sid) {
		Cookie mycookies = new Cookie("terry", sid);
		mycookies.setMaxAge(-1);
		mycookies.setDomain("locahost");
		mycookies.setPath("/");
		response.addCookie(mycookies);
	}
}

五、CacheHttpSessionの実現:

public class CacheHttpSession extends HttpSessionWrapper {

	private String sid;
	private RedisTemplate redisTemplate;
	private StringRedisSerializer stringSerializer = new StringRedisSerializer();
	public CacheHttpSession(HttpSession session,String sid,RedisTemplate redisTemplate) {
		super(session);
		this.sid = sid;
		this.redisTemplate = redisTemplate;
	}

	@SuppressWarnings("unchecked")
	@Override
	public Enumeration getAttributeNames() {
		final byte[] key = stringSerializer.serialize(sid);
		Object result = redisTemplate.execute(new RedisCallback

六、HttpSessionWrapperの実現:

public class HttpSessionWrapper implements HttpSession {

	private HttpSession session;
	public HttpSessionWrapper(HttpSession session) {
		this.session = session;
	}
	@Override
	public long getCreationTime() {
		return this.session.getCreationTime();
	}

	@Override
	public String getId() {
		return this.session.getId();
	}

	@Override
	public long getLastAccessedTime() {
		return this.session.getLastAccessedTime();
	}

	@Override
	public ServletContext getServletContext() {
		return this.session.getServletContext();
	}

	@Override
	public void setMaxInactiveInterval(int interval) {
		this.session.setMaxInactiveInterval(interval);
	}

	@Override
	public int getMaxInactiveInterval() {
		return this.session.getMaxInactiveInterval();
	}

	@Override
	public HttpSessionContext getSessionContext() {
		return this.session.getSessionContext();
	}

	@Override
	public Object getAttribute(String name) {
		return this.session.getAttribute(name);
	}

	@Override
	public Object getValue(String name) {
		return this.session.getValue(name);
	}

	@Override
	public Enumeration getAttributeNames() {
		return this.session.getAttributeNames();
	}

	@Override
	public String[] getValueNames() {
		return this.session.getValueNames();
	}

	@Override
	public void setAttribute(String name, Object value) {
		this.session.setAttribute(name,value);
	}

	@Override
	public void putValue(String name, Object value) {
		this.session.putValue(name,value);
	}

	@Override
	public void removeAttribute(String name) {
		this.session.removeAttribute(name);
	}

	@Override
	public void removeValue(String name) {
		this.session.removeValue(name);
	}

	@Override
	public void invalidate() {
		this.session.invalidate();
	}

	@Override
	public boolean isNew() {
		return this.session.isNew();
	}
}

以上のコードでセッションをredisに保存できますが、セッションIdの生成、セッション過去、オブジェクトシーケンス化(テストはstringを便利に統一するために使用されています)など、多くの問題があります.後で改善する時間がある.