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From JPercivall <...@git.apache.org>
Subject [GitHub] nifi pull request #525: NIFI-1976 - Windows Event Log native processor
Date Thu, 16 Jun 2016 23:15:05 GMT
Github user JPercivall commented on a diff in the pull request:

    https://github.com/apache/nifi/pull/525#discussion_r67440428
  
    --- Diff: nifi-nar-bundles/nifi-windows-event-log-bundle/nifi-windows-event-log-processors/src/main/java/org/apache/nifi/processors/windows/event/log/jna/WEvtApi.java
---
    @@ -0,0 +1,62 @@
    +/*
    + * Licensed to the Apache Software Foundation (ASF) under one or more
    + * contributor license agreements.  See the NOTICE file distributed with
    + * this work for additional information regarding copyright ownership.
    + * The ASF licenses this file to You under the Apache License, Version 2.0
    + * (the "License"); you may not use this file except in compliance with
    + * the License.  You may obtain a copy of the License at
    + *
    + *     http://www.apache.org/licenses/LICENSE-2.0
    + *
    + * Unless required by applicable law or agreed to in writing, software
    + * distributed under the License is distributed on an "AS IS" BASIS,
    + * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
    + * See the License for the specific language governing permissions and
    + * limitations under the License.
    + */
    +
    +package org.apache.nifi.processors.windows.event.log.jna;
    +
    +import com.sun.jna.Native;
    +import com.sun.jna.Pointer;
    +import com.sun.jna.platform.win32.WinDef;
    +import com.sun.jna.platform.win32.WinNT;
    +import com.sun.jna.win32.StdCallLibrary;
    +import com.sun.jna.win32.W32APIOptions;
    +
    +/**
    + * JNA will create the instance of this interface with Native.loadLibrary().
    + * Please see https://msdn.microsoft.com/en-us/library/windows/desktop/aa385772(v=vs.85).aspx
for documentation on the methods and data structures.
    + */
    +public interface WEvtApi extends StdCallLibrary {
    +    WEvtApi INSTANCE = (WEvtApi) Native.loadLibrary("wevtapi", WEvtApi.class, W32APIOptions.DEFAULT_OPTIONS);
    +
    +    WinNT.HANDLE EvtSubscribe(WinNT.HANDLE session, WinNT.HANDLE signalEvent, String
channelName, String xpathQuery,
    +                              WinNT.HANDLE bookmark, WinDef.PVOID context, EVT_SUBSCRIBE_CALLBACK
evtSubscribeCallback, int flags);
    +
    +    boolean EvtRender(WinNT.HANDLE context, WinNT.HANDLE fragment, int flags, int bufferSize,
Pointer buffer, Pointer bufferUsed, Pointer propertyCount);
    +
    +    interface EvtSubscribeNotifyAction {
    +        int ERROR = 0;
    +        int DELIVER = 1;
    +    }
    +
    +    interface EvtSubscribeFlags {
    --- End diff --
    
    What is the purpose of this and EvtRenderFlags? Only the SUBSCRIBE_TO_FUTURE and EVENT_XML
values are used.


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