Examples with FSEditLogOp org.apache.hadoop.hdfs.server.namenode.FSEditLogOp used on opensource projects

Example 6 with FSEditLogOp

use of org.apache.hadoop.hdfs.server.namenode.FSEditLogOp in project hadoop by apache.

the class OfflineEditsXmlLoader method endElement.

@Override
public void endElement(String uri, String name, String qName) {
    String str = XMLUtils.unmangleXmlString(cbuf.toString(), false).trim();
    cbuf = new StringBuffer();
    switch(state) {
        case EXPECT_EDITS_TAG:
            throw new InvalidXmlException("expected <EDITS/>");
        case EXPECT_VERSION:
            if (!name.equals("EDITS_VERSION")) {
                throw new InvalidXmlException("expected </EDITS_VERSION>");
            }
            try {
                int version = Integer.parseInt(str);
                visitor.start(version);
            } catch (IOException e) {
                // Can't throw IOException from a SAX method, sigh.
                throw new RuntimeException(e);
            }
            state = ParseState.EXPECT_RECORD;
            break;
        case EXPECT_RECORD:
            if (name.equals("EDITS")) {
                state = ParseState.EXPECT_END;
            } else if (!name.equals("RECORD")) {
                throw new InvalidXmlException("expected </EDITS> or </RECORD>");
            }
            break;
        case EXPECT_OPCODE:
            if (!name.equals("OPCODE")) {
                throw new InvalidXmlException("expected </OPCODE>");
            }
            opCode = FSEditLogOpCodes.valueOf(str);
            state = ParseState.EXPECT_DATA;
            break;
        case EXPECT_DATA:
            throw new InvalidXmlException("expected <DATA/>");
        case HANDLE_DATA:
            stanza.setValue(str);
            if (stanzaStack.empty()) {
                if (!name.equals("DATA")) {
                    throw new InvalidXmlException("expected </DATA>");
                }
                state = ParseState.EXPECT_RECORD;
                FSEditLogOp op = opCache.get(opCode);
                opCode = null;
                try {
                    op.decodeXml(stanza);
                    stanza = null;
                } finally {
                    if (stanza != null) {
                        System.err.println("fromXml error decoding opcode " + opCode + "\n" + stanza.toString());
                        stanza = null;
                    }
                }
                if (fixTxIds) {
                    if (nextTxId <= 0) {
                        nextTxId = op.getTransactionId();
                        if (nextTxId <= 0) {
                            nextTxId = 1;
                        }
                    }
                    op.setTransactionId(nextTxId);
                    nextTxId++;
                }
                try {
                    visitor.visitOp(op);
                } catch (IOException e) {
                    // Can't throw IOException from a SAX method, sigh.
                    throw new RuntimeException(e);
                }
                state = ParseState.EXPECT_RECORD;
            } else {
                stanza = stanzaStack.pop();
            }
            break;
        case EXPECT_END:
            throw new InvalidXmlException("not expecting anything after </EDITS>");
    }
}