The bug影响了我的应用程序开发。所以我试着解决它。然后我比较了kaa 0.9和kaa 0.10的代码。我发现Kaa DAO接口模块的类EndpointServiceImpl存在差异：attachEndpointToUser有两种方法
1，
public EndpointProfileDto attachEndpointToUser(String endpointUserId, String
endpointAccessToken) throws KaaOptimisticLockingFailureException {
LOG.info("Try to attach endpoint with access token {} to user with {}", endpointAccessToken,
endpointUserId);
validateString(endpointUserId, "Incorrect endpointUserId "
+ endpointUserId);
EndpointUser endpointUser = endpointUserDao.findById(endpointUserId);
LOG.trace("[{}] Found endpoint user with id {} ", endpointUserId, endpointUser);
if (endpointUser
!= null) {
EndpointProfile endpoint = endpointProfileDao.findByAccessToken(endpointAccessToken);
LOG.trace("[{}] Found endpoint profile by with access token {} ", endpointAccessToken,
endpoint);
if (endpoint
!= null) {
if (endpoint.getEndpointUserId()
== null
|| endpointUserId.equals(endpoint.getEndpointUserId())) {
LOG.debug("Attach endpoint profile with id {} to endpoint user with id {} ", endpoint
.getId(), endpointUser.getId());
List<String> endpointIds = endpointUser.getEndpointIds();
**/*if (endpointIds
!= null
&& endpointIds.contains(endpoint.getId())) {
LOG.warn("Endpoint is already assigned to current user {}.", endpoint
.getEndpointUserId());
return getDto(endpoint);
}*/**
if (endpointIds
== null) {
endpointIds = new ArrayList<>();
endpointUser.setEndpointIds(endpointIds);
}
endpointIds.add(endpoint.getId());
endpointUser = endpointUserDao.save(endpointUser);
while (true) {
try {
endpoint.setEndpointUserId(endpointUser.getId());
LOG.trace("Save endpoint user {} and endpoint profile {}", endpointUser, endpoint);
endpoint = endpointProfileDao.save(endpoint);
break;
} catch (KaaOptimisticLockingFailureException ex) {
LOG.warn("Optimistic lock detected in endpoint profile ", Arrays.toString(endpoint
.getEndpointKey()), ex);
endpoint = endpointProfileDao.findByKeyHash(Sha1HashUtils.hashToBytes(endpoint
.getEndpointKey()));
}
}
return getDto(endpoint);
} else {
LOG.warn("Endpoint is already assigned to different user {}. Unassign it first!.",
endpoint.getEndpointUserId());
throw new DatabaseProcessingException("Endpoint is already assigned to different user.");
}
} else {
LOG.warn("Endpoint with accessToken {} is not present in db.", endpointAccessToken);
throw new DatabaseProcessingException("No endpoint found for specified accessToken.");
}
} else {
LOG.warn("Endpoint user with id {} is not present in db.", endpointUserId);
throw new DatabaseProcessingException("Endpoint user is not present in db.");
}
}
2，
public EndpointProfileDto attachEndpointToUser(String userExternalId, String tenantId,
EndpointProfileDto profile) {
validateString(userExternalId, "Incorrect userExternalId "
+ userExternalId);
EndpointUser endpointUser = endpointUserDao.findByExternalIdAndTenantId(userExternalId,
tenantId);
if (endpointUser
== null) {
LOG.info("Creating new endpoint user with external id: [{}] in context of [{}] tenant",
userExternalId, tenantId);
EndpointUserDto endpointUserDto = new EndpointUserDto();
endpointUserDto.setTenantId(tenantId);
endpointUserDto.setExternalId(userExternalId);
endpointUserDto.setUsername(userExternalId);
endpointUser = endpointUserDao.save(endpointUserDto);
}
List<String> endpointIds = endpointUser.getEndpointIds();
if (endpointIds
== null) {
endpointIds = new ArrayList<>();
endpointUser.setEndpointIds(endpointIds);
} **/*else if (endpointIds
!= null
&& endpointIds.contains(profile.getId())) {
LOG.warn("Endpoint is already assigned to current user {}.", profile.getEndpointUserId());
return profile;
}*/**
endpointIds.add(profile.getId());
endpointUser = endpointUserDao.save(endpointUser);
profile.setEndpointUserId(endpointUser.getId());
while (true) {
try {
LOG.trace("Save endpoint user {} and endpoint profile {}", endpointUser, profile);
return saveEndpointProfile(profile);
} catch (KaaOptimisticLockingFailureException ex) {
LOG.warn("Optimistic lock detected in endpoint profile ", Arrays.toString(profile
.getEndpointKey()), ex);
profile = findEndpointProfileByKeyHash(profile.getEndpointKeyHash());
profile.setEndpointUserId(endpointUser.getId());
}
}
}
上面的代码是在kaa 0.10。与Kaa 0.9相比，它增加了一个判断条件，在上面的粗体代码中:(
if（endpointIds！= null＆amp;＆amp; endpointIds.contains（endpoint.getId（））））
和
else if（endpointIds ！= null ＆安培;＆安培; endpointIds.contains（profile.getId（）））。
我做了一个测试评论判断条件代码。结果还可以。我想知道修复方法是可用的。