Failed to acquire lock for collection file ClosedChannelException

[Srdjan-V]

If you try to upsert a large collection that contains new and updated items the operation will fail.

Failed to acquire lock for collection file X.json
java.nio.channels.ClosedChannelException: null
	at java.base/sun.nio.ch.FileChannelImpl.ensureOpen(FileChannelImpl.java:160) ~[?:?]
	at java.base/sun.nio.ch.FileChannelImpl.lock(FileChannelImpl.java:1463) ~[?:?]
	at java.base/java.nio.channels.FileChannel.lock(FileChannel.java:1240) ~[?:?]
	at io.jsondb.io.JsonWriter.acquireLock(JsonWriter.java:101) ~[jsondb-core-1.0.115-j11.jar:?]
	at io.jsondb.io.JsonWriter.updateInJsonFile(JsonWriter.java:601) ~[jsondb-core-1.0.115-j11.jar:?]
	at io.jsondb.JsonDBTemplate.upsert(JsonDBTemplate.java:1257) ~[jsondb-core-1.0.115-j11.jar:?]
	at io.jsondb.JsonDBTemplate.upsert(JsonDBTemplate.java:1194) ~[jsondb-core-1.0.115-j11.jar:?]

After the items get appended, the file channel will get closed, causing the update to fail since its unable to obtain the file lock.

jsondb-core/src/main/java/io/jsondb/JsonDBTemplate.java

Lines 1257 to 1268 in 12b2c72

	if (collectionToInsert.size() > 0) {
	boolean insertResult = jw.appendToJsonFile(collection.values(), collectionToInsert.values());
	if(insertResult) {
	collection.putAll(collectionToInsert);
	}
	}
	if (collectionToUpdate.size() > 0) {
	boolean updateResult = jw.updateInJsonFile(collection, collectionToUpdate);
	if (updateResult) {
	collection.putAll(collectionToUpdate);
	}

jsondb-core/src/main/java/io/jsondb/io/JsonWriter.java

Lines 114 to 132 in 12b2c72

	private void releaseLock(FileLock lock) {
	try {
	if(lock != null && lock.isValid()) {
	lock.release();
	}
	} catch (IOException e) {
	logger.error("Failed to release lock for collection file {}", collectionFile.getName(), e);
	}
	try {
	channel.close();
	} catch (IOException e) {
	logger.error("Failed to close FileChannel for collection file {}", collectionFile.getName(), e);
	}
	try {
	raf.close();
	} catch (IOException e) {
	logger.error("Failed to close RandomAccessFile for collection file {}", collectionFile.getName(), e);
	}
	}

jsondb-core/src/main/java/io/jsondb/io/JsonWriter.java

Lines 99 to 112 in 12b2c72

	private FileLock acquireLock() throws IOException {
	try {
	FileLock fileLock= channel.lock();
	return fileLock;
	} catch (IOException e) {
	try {
	channel.close();
	raf.close();
	} catch (IOException e1) {
	logger.error("Failed while closing RandomAccessFile for collection file {}", collectionFile.getName());
	}
	throw e;
	}
	}