wangwei created SINGA-61:
----------------------------
Summary: Support user defined classes
Key: SINGA-61
URL: https://issues.apache.org/jira/browse/SINGA-61
Project: Singa
Issue Type: New Feature
Reporter: wangwei
Many modules in SINGA are extensible. To make it easy for users to implement
their own classes. SINGA separates user code and SINGA code. Users just compile
their code and link it with libsinga.so. One problem in this design is on the
configuration. Take the Layer configuration as an example。
{code}
enum LayerType{
kFoo = 2;
...
}
message LayerProto {
required LayerType type = 2;
}
{code}
The types of all built-in layers are defined in *enum LayerType*. However, for
user defined Layer sub-classes, users cannot add them into *LayerType* without
recompiling SINGA code (google protocol buffer does not support extension of
enum types).
To solve this problem, SINGA needs one field for the type of user defined Layer
sub-classes.
{code}
message LayerProto {
optional LayerType type =2;
optional string user_type = 3;
}
{code}
In user's job configuration file, he either sets *type* ( for built-in layer)
or set *user_type* (for user defined layer).
It is similar for other classes, e.g., Worker, Updater, etc.
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