/**
* Reads in the registered SPARQL endpoints from the configuration file /endpoints.txt. Each line
* of this file must contain the URL of a SPARQL endpoint.
*/
public EndpointManagement() {
try {
this.urlsOfEndpoints =
FileHelper.readInputStreamToCollection(
FileHelper.getInputStreamFromJarOrFile("/endpoints.config"))
.toArray(new String[0]);
for (int i = 0; i < this.urlsOfEndpoints.length; i++) {
if (!this.urlsOfEndpoints[i].endsWith("/")) {
// this is necessary when using distribution strategies as different contexts must be
// addressed for different key types
this.urlsOfEndpoints[i] += "/";
}
}
} catch (final FileNotFoundException e) {
System.err.println(e);
e.printStackTrace();
this.urlsOfEndpoints = new String[0];
}
}
public static void readTriples(String type, final InputStream input, final TripleConsumer tc)
throws Exception {
type = type.toUpperCase();
if (type.startsWith("MULTIPLE")) {
final String typeWithoutMultiple = type.substring("MULTIPLE".length());
if (MULTIPLEDATATHREADS == 1) {
final BoundedBuffer<Triple> bbTriples = new BoundedBuffer<Triple>(MAX_TRIPLES_IN_BUFFER);
final Thread thread =
new Thread() {
@Override
public void run() {
for (final String filename : FileHelper.readInputStreamToCollection(input)) {
System.out.println("Reading data from file: " + filename);
try {
String type2;
if (typeWithoutMultiple.compareTo("DETECT") == 0) {
final int index = filename.lastIndexOf('.');
if (index == -1) {
System.err.println(
"Type of " + filename + " could not be automatically detected!");
}
type2 = filename.substring(index + 1).toUpperCase();
} else {
type2 = typeWithoutMultiple;
}
readTriplesWithoutMultipleFiles(
type2,
new FileInputStream(filename),
new TripleConsumer() {
@Override
public void consume(final Triple triple) {
try {
bbTriples.put(triple);
} catch (final InterruptedException e) {
System.err.println(e);
e.printStackTrace();
}
}
});
} catch (final Throwable e) {
System.err.println(e);
e.printStackTrace();
}
}
bbTriples.endOfData();
}
};
thread.start();
Triple t;
try {
while ((t = bbTriples.get()) != null) {
tc.consume(t);
}
} catch (final InterruptedException e) {
System.err.println(e);
e.printStackTrace();
}
} else {
final TripleConsumer synchronizedTC =
new TripleConsumer() {
@Override
public synchronized void consume(final Triple triple) {
tc.consume(triple);
}
};
final Collection<String> filenames = FileHelper.readInputStreamToCollection(input);
final BoundedBuffer<String> filenamesBB = new BoundedBuffer<String>(filenames.size());
for (final String filename : filenames) {
try {
filenamesBB.put(filename);
} catch (final InterruptedException e) {
System.err.println(e);
e.printStackTrace();
}
}
filenamesBB.endOfData();
final Thread[] threads = new Thread[MULTIPLEDATATHREADS];
for (int i = 0; i < MULTIPLEDATATHREADS; i++) {
threads[i] =
new Thread() {
@Override
public void run() {
try {
while (filenamesBB.hasNext()) {
final String filename = filenamesBB.get();
if (filename == null) {
break;
}
System.out.println("Reading data from file: " + filename);
String type2;
if (typeWithoutMultiple.compareTo("DETECT") == 0) {
final int index = filename.lastIndexOf('.');
if (index == -1) {
System.err.println(
"Type of " + filename + " could not be automatically detected!");
}
type2 = filename.substring(index + 1).toUpperCase();
} else {
type2 = typeWithoutMultiple;
}
try {
readTriplesWithoutMultipleFiles(
type2, new FileInputStream(filename), synchronizedTC);
} catch (final Throwable e) {
System.err.println(e);
e.printStackTrace();
}
}
} catch (final InterruptedException e) {
System.err.println(e);
e.printStackTrace();
}
}
};
threads[i].start();
}
for (int i = 0; i < MULTIPLEDATATHREADS; i++) {
try {
threads[i].join();
} catch (final InterruptedException e) {
System.err.println(e);
e.printStackTrace();
}
}
}
} else {
readTriplesWithoutMultipleFiles(type, input, tc);
}
}