Earthworm wave server

[andreabono]

Is there a way to post a POST request to the earthworm wave server?
If not, is there any way to post concurrent requests?

[crotwell]

waveserver is raw socket based, not http, so not quite sure what you mean by POST. The commands allowed are documented here; http://folkworm.ceri.memphis.edu/ew-doc/ovr/wave_serverV_ovr.html

It may be possible to send the next command before the previous one's data arrives, but I did not code seisFile's waveserver code to handle that case. The code is not complicated, so you might be able to modify it to handle that case.

That said, there is nothing prohibiting a client from opening multiple sockets for concurrent downloads. You would likely want to be multithreaded for that to be effective.

[andreabono]

Good, perfect... I'm migrating from version 1.8.5 to version 2.0.2 and I can't find any implementation of MSeedQueryClient.
It is not needed anymore? I can just use the WaveServer class to read data streams to miniseed files?

[crotwell]

Yes, you should be able to use

public List<DataRecord> read(String query)

in WaveServer to get miniseed records converted from TraceBuf2 returned from a waveserver.

[andreabono]

I got it, here's a working code snippet

public String  readData(String station , String channel,  String network, 
            String location, Date begin, Date end, String output_path) throws IOException{

        String outputFile = output_path +station+"."+channel+".mseed";

        try {
            // "query" is a class scoped member (String)
            query = reader.createQuery(network, station, location, channel, begin.toInstant(), end.toInstant());

            List<DataRecord> dati = reader.read(query);
            if (dati!=null){
                ListIterator drIter = dati.listIterator();

                DataOutputStream out = null;

                if (!drIter.hasNext()) {
                    System.out.println("No data for " + query);
                }

                if (outputFile != null) {
                    out = new DataOutputStream(new BufferedOutputStream(new FileOutputStream(outputFile)));
                }
                DataRecord dr;
                while (drIter.hasNext()) {
                    dr = (DataRecord)drIter.next();

                    dr.write(out);
                }
                dr=null;

                return outputFile;
            } else 
                return null;

        } catch (Exception ex) {
            Logger.getLogger("org.ingv.pickfx").log(java.util.logging.Level.SEVERE, ex.getMessage());
            return null;
        } 
    }