Example usage for org.apache.lucene.util IOUtils deleteFilesIgnoringExceptions

Introduction

In this page you can find the example usage for org.apache.lucene.util IOUtils deleteFilesIgnoringExceptions.

Prototype

public static void deleteFilesIgnoringExceptions(Directory dir, String... files) 

Source Link

Usage

From source file:org.apache.solr.core.snapshots.SolrSnapshotMetaDataManager.java

License:Apache License

private synchronized void persist() throws IOException {
    String fileName = SNAPSHOTS_PREFIX + nextWriteGen;
    IndexOutput out = dir.createOutput(fileName, IOContext.DEFAULT);
    boolean success = false;
    try {/*  w w w. ja  va2s.co  m*/
        CodecUtil.writeHeader(out, CODEC_NAME, VERSION_CURRENT);
        out.writeVInt(nameToDetailsMapping.size());
        for (Entry<String, SnapshotMetaData> ent : nameToDetailsMapping.entrySet()) {
            out.writeString(ent.getKey());
            out.writeString(ent.getValue().getIndexDirPath());
            out.writeVLong(ent.getValue().getGenerationNumber());
        }
        success = true;
    } finally {
        if (!success) {
            IOUtils.closeWhileHandlingException(out);
            IOUtils.deleteFilesIgnoringExceptions(dir, fileName);
        } else {
            IOUtils.close(out);
        }
    }

    dir.sync(Collections.singletonList(fileName));

    if (nextWriteGen > 0) {
        String lastSaveFile = SNAPSHOTS_PREFIX + (nextWriteGen - 1);
        // exception OK: likely it didn't exist
        IOUtils.deleteFilesIgnoringExceptions(dir, lastSaveFile);
    }

    nextWriteGen++;
}

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From source file:org.apache.solr.core.snapshots.SolrSnapshotMetaDataManager.java

License:Apache License

/**
 * Reads the snapshot meta-data information from the given {@link Directory}.
 *///from w  w w.j  a va 2 s.c  o m
private synchronized void loadFromSnapshotMetadataFile() throws IOException {
    log.debug("Loading from snapshot metadata file...");
    long genLoaded = -1;
    IOException ioe = null;
    List<String> snapshotFiles = new ArrayList<>();
    for (String file : dir.listAll()) {
        if (file.startsWith(SNAPSHOTS_PREFIX)) {
            long gen = Long.parseLong(file.substring(SNAPSHOTS_PREFIX.length()));
            if (genLoaded == -1 || gen > genLoaded) {
                snapshotFiles.add(file);
                Map<String, SnapshotMetaData> snapshotMetaDataMapping = new HashMap<>();
                IndexInput in = dir.openInput(file, IOContext.DEFAULT);
                try {
                    CodecUtil.checkHeader(in, CODEC_NAME, VERSION_START, VERSION_START);
                    int count = in.readVInt();
                    for (int i = 0; i < count; i++) {
                        String name = in.readString();
                        String indexDirPath = in.readString();
                        long commitGen = in.readVLong();
                        snapshotMetaDataMapping.put(name, new SnapshotMetaData(name, indexDirPath, commitGen));
                    }
                } catch (IOException ioe2) {
                    // Save first exception & throw in the end
                    if (ioe == null) {
                        ioe = ioe2;
                    }
                } finally {
                    in.close();
                }

                genLoaded = gen;
                nameToDetailsMapping.clear();
                nameToDetailsMapping.putAll(snapshotMetaDataMapping);
            }
        }
    }

    if (genLoaded == -1) {
        // Nothing was loaded...
        if (ioe != null) {
            // ... not for lack of trying:
            throw ioe;
        }
    } else {
        if (snapshotFiles.size() > 1) {
            // Remove any broken / old snapshot files:
            String curFileName = SNAPSHOTS_PREFIX + genLoaded;
            for (String file : snapshotFiles) {
                if (!curFileName.equals(file)) {
                    IOUtils.deleteFilesIgnoringExceptions(dir, file);
                }
            }
        }
        nextWriteGen = 1 + genLoaded;
    }
}

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