private String getNotModified(String dataId, CacheData cacheData, HttpMethod httpMethod) {
Header md5Header = httpMethod.getResponseHeader(Constants.CONTENT_MD5);
if (null == md5Header) {
throw new RuntimeException("RP_NO_CHANGE response not contain MD5");
}
String md5 = md5Header.getValue();
if (!cacheData.getMd5().equals(md5)) {
String lastMd5 = cacheData.getMd5();
cacheData.setMd5(Constants.NULL);
cacheData.setLastModifiedHeader(Constants.NULL);
throw new RuntimeException(
"MD5 verify error,DataID:["
+ dataId
+ "]MD5 last:["
+ lastMd5
+ "]MD5 current:["
+ md5
+ "]");
}
cacheData.setMd5(md5);
changeSpacingInterval(httpMethod);
if (log.isInfoEnabled()) {
log.info("DataId: " + dataId + ",not changed");
}
return null;
}
private String getSuccess(
String dataId, String group, CacheData cacheData, HttpMethod httpMethod) {
String configInfo = Constants.NULL;
configInfo = getContent(httpMethod);
if (null == configInfo) {
throw new RuntimeException("RP_OK configInfo is null");
}
Header md5Header = httpMethod.getResponseHeader(Constants.CONTENT_MD5);
if (null == md5Header) {
throw new RuntimeException("RP_OK not contain MD5, " + configInfo);
}
String md5 = md5Header.getValue();
if (!checkContent(configInfo, md5)) {
throw new RuntimeException(
"MD5 verify error,DataID:["
+ dataId
+ "]ConfigInfo:["
+ configInfo
+ "]MD5:["
+ md5
+ "]");
}
Header lastModifiedHeader = httpMethod.getResponseHeader(Constants.LAST_MODIFIED);
if (null == lastModifiedHeader) {
throw new RuntimeException("RP_OK result not contain lastModifiedHeader");
}
String lastModified = lastModifiedHeader.getValue();
cacheData.setMd5(md5);
cacheData.setLastModifiedHeader(lastModified);
changeSpacingInterval(httpMethod);
String key = makeCacheKey(dataId, group);
contentCache.put(key, configInfo);
StringBuilder buf = new StringBuilder();
buf.append("dataId=").append(dataId);
buf.append(" ,group=").append(group);
buf.append(" ,content=").append(configInfo);
dataLog.info(buf.toString());
return configInfo;
}
String getConfigureInformation(
String dataId, String group, long timeout, boolean skipContentCache) {
start();
if (!isRun) {
throw new RuntimeException(
"DiamondSubscriber is not running, so can't fetch from ConfigureInformation");
}
if (null == group) {
group = Constants.DEFAULT_GROUP;
}
// =======================ʹ�ò���ģʽ=======================
if (MockServer.isTestMode()) {
return MockServer.getConfigInfo(dataId, group);
}
if (!skipContentCache) {
String key = makeCacheKey(dataId, group);
String content = contentCache.get(key);
if (content != null) {
return content;
}
}
long waitTime = 0;
String uri = getUriString(dataId, group);
if (log.isInfoEnabled()) {
log.info(uri);
}
CacheData cacheData = getCacheData(dataId, group);
int retryTimes = this.getDiamondConfigure().getRetrieveDataRetryTimes();
log.info("Retry times is " + retryTimes);
int tryCount = 0;
while (0 == timeout || timeout > waitTime) {
tryCount++;
if (tryCount > retryTimes + 1) {
log.warn("Retry time reach the limit, so break");
break;
}
log.info("Fetch config " + tryCount + "times, waitTime:" + waitTime);
long onceTimeOut = getOnceTimeOut(waitTime, timeout);
waitTime += onceTimeOut;
HttpMethod httpMethod = new GetMethod(uri);
configureHttpMethod(skipContentCache, cacheData, onceTimeOut, httpMethod);
try {
int httpStatus = httpClient.executeMethod(httpMethod);
switch (httpStatus) {
case SC_OK:
{
String result = getSuccess(dataId, group, cacheData, httpMethod);
return result;
}
case SC_NOT_MODIFIED:
{
String result = getNotModified(dataId, cacheData, httpMethod);
return result;
}
case SC_NOT_FOUND:
{
log.warn("DataID:" + dataId + "not found");
cacheData.setMd5(Constants.NULL);
this.snapshotConfigInfoProcessor.removeSnapshot(dataId, group);
return null;
}
case SC_SERVICE_UNAVAILABLE:
{
rotateToNextDomain();
}
break;
default:
{
log.warn("HTTP State: " + httpStatus + ":" + httpClient.getState());
rotateToNextDomain();
}
}
} catch (HttpException e) {
log.error("Fetch config HttpException", e);
rotateToNextDomain();
} catch (IOException e) {
log.error("Fetch config IOException", e);
rotateToNextDomain();
} catch (Exception e) {
log.error("Unknown Exception", e);
rotateToNextDomain();
} finally {
httpMethod.releaseConnection();
}
}
throw new RuntimeException(
"Fetch config timeout, DataID=" + dataId + ", Group=" + group + ",timeout=" + timeout);
}